I'm new to android, and I'm writing a program use bluetooth, so I use another thread and handler to update UI. When I has only one TextView, it works, but when I add more textview, it doesn't work.
My OnCreate
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvSpeed = (TextView) findViewById(R.id.SpeedView02);
tvHeart = (TextView) findViewById(R.id.HeartRate02);
tvGrade = (TextView) findViewById(R.id.Grandient02);
btnConnect = (Button) findViewById(R.id.BtnConnect);
btAdapter = BluetoothAdapter.getDefaultAdapter();
if (btAdapter == null) {
Toast.makeText(this,
"Bluetooth is not supported on this hardware platform",
1000).show();
onDestroy();
}
}
My Handler
private final Handler handler = new Handler() {
private int current;
public void handleMessage(Message msg) {
current = (Integer) msg.obj;
switch(msg.what)
{
case 1:
tvSpeed.setText(current + "Km/h");
break;
case 2:
tvHeart.setText(current + "Bps");
break;
default:
break;
}
tvGrade.setText(0); // if I remove this, it works.
}
};
my main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout android:id="#+id/LinearLayout01"
android:layout_width="wrap_content" android:layout_height="wrap_content">
<TextView android:id="#+id/SpeedView01" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="速度："></TextView>
<TextView android:id="#+id/SpeedView02" android:layout_width="70dip"
android:layout_height="wrap_content"
android:text=""></TextView>
<TextView android:id="#+id/HeartRate01" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="心率："></TextView>
<TextView android:id="#+id/HeartRate02" android:layout_width="70dip"
android:layout_height="wrap_content"
android:text=""></TextView>
<TextView android:id="#+id/Gradient01" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="坡度："></TextView>
<TextView android:id="#+id/Grandient02" android:layout_width="70dip"
android:layout_height="wrap_content"
android:text=""></TextView>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent" android:layout_height="wrap_content" >
<Button android:id="#+id/BtnConnect" android:layout_width="match_parent"
android:layout_height="wrap_content" android:text="Connect"
android:layout_weight="1.0" android:onClick="onConnectButtonClicked" />
<Button android:id="#+id/BtnQuit" android:layout_width="match_parent"
android:layout_height="wrap_content" android:text="Exit"
android:layout_weight="1.0" android:onClick="onQuitButtonClicked" />
</LinearLayout>
</LinearLayout>
setText(0);
You do realize setText(int) is a function that expects a valid R.string.XXX value...
Clearly, 0 will never be a valid value, it's prolly throwing a "Resource Not found" exception.
Instead of handler, i would suggest you to use AsyncTask which is known as Painless Threading in android.
Inside doInBackground(), implement all your background task
once you are having values, you can make UI updation inside the onPostExecute() method.
Related
How can I used TextToSpeech on textView with multiple LinearLayout ?
I' trying to add TTS method on emails to read it, so I worked on mail client from open source and started to add the TTS code inside it, so when the button is clicked,the message should be read out loud
this is what I do:
the name of activity class is MessageContainerView
unsignedText = (TextView) findViewById(R.id.message_unsigned_text);
buttonRead =(Button)findViewById(R.id.button);
t1=new TextToSpeech(activity.getApplicationContext(), new TextToSpeech.OnInitListener() {
#Override
public void onInit(int status) {
if(status != TextToSpeech.ERROR) {
t1.setLanguage(Locale.UK);
}
}
});
buttonRead.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String toSpeak = unsignedText.getText().toString();
Toast.makeText(activity.getApplicationContext(), toSpeak,Toast.LENGTH_SHORT).show();
t1.speak(toSpeak, TextToSpeech.QUEUE_FLUSH, null);
}
});
but when I clicked the button,the app stopped
<?xml version="1.0" encoding="utf-8"?>
<com.fsck.k9.ui.messageview.MessageContainerView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Content area -->
<com.fsck.k9.view.MessageWebView
android:id="#+id/message_content"
android:layout_height="wrap_content"
android:layout_width="fill_parent" />
<!-- Unsigned content area -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/message_unsigned_container"
android:visibility="gone"
tools:visibility="visible"
>
<LinearLayout
android:id="#+id/message_unsigned_divider"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
>
<View
android:layout_width="16dp"
android:layout_height="4dp"
android:layout_marginTop="1dp"
android:layout_gravity="center_vertical"
android:background="#d55"
/>
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:textAppearance="?android:textAppearanceSmall"
android:text="#string/unsigned_text_divider_label"
android:textColor="#d55"
/>
<View
android:layout_width="wrap_content"
android:layout_height="4dp"
android:layout_marginTop="1dp"
android:layout_gravity="center_vertical"
android:background="#d55" />
</LinearLayout>
<TextView
android:id="#+id/message_unsigned_text"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:padding="8dp"
tools:text="Unsigned text content"
/>
</LinearLayout>
<!-- Attachments area -->
<LinearLayout
android:id="#+id/attachments_container"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/attachments"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button" />
</com.fsck.k9.ui.messageview.MessageContainerView>
Is that because a multiple LinearLayout? so the TTS code doesn't reach to text inside TextView?
Text to speech for multiple text one by one.try this
private void speakOut () {
String que = tvone.getText().toString();
String op1 = tvtwo.getText().toString();
String op2 = tvthree.getText().toString();
String op3 = tvfoure.getText().toString();
String op4 = tvfive.getText().toString();
tts.speak(que, TextToSpeech.QUEUE_ADD, null);
tts.speak(op1, TextToSpeech.QUEUE_ADD, null);
tts.speak(op2, TextToSpeech.QUEUE_ADD, null);
tts.speak(op3, TextToSpeech.QUEUE_ADD, null);
tts.speak(op4, TextToSpeech.QUEUE_ADD, null);
}
this sounds easy at the beginning but is driving me insane.
So i downloaded the latest android sdk and eclipse and now there is somthing new.... :
when iam creating a Activity and a Layout it generates me 2 Layout files somthing like: main_laout.xml and fragment_main.xml
however eclipse opend up only the fragment file and i made my GUI there. When iam starting my Application all my Buttons and TextViews are there. I Press a button and a Second Activity starts.
And here my Problem: The Second Activity is like the First one (the 2 layout xml files but here called status)
when iam trying to change a TextView there i get a nullPointer exception. Can anyone plz help me with this iam getting crazy.
My Code so far:
statusActivity:
public class StatusActivity extends ActionBarActivity{
private TextView version,dbstatus,dbrows;
private Button done,refresh;
NetworkTask task;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_status);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
version=(TextView) findViewById(R.id.versionsOutputTextSTATUS);
dbstatus=(TextView) this.findViewById(R.id.dbstatusOutputTextSTATUS);
dbrows=(TextView) this.findViewById(R.id.dbRowsOutputTextSTATUS);
done=(Button) this.findViewById(R.id.beendenButtonSTATUS);
refresh=(Button) this.findViewById(R.id.refreshButtonSTATUS);
version.setText("Test");
}
And my xml files:
activity_status.xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="de.project.zigbeecontrol.StatusActivity"
tools:ignore="MergeRootFrame" />
fragment_status.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/eisblumen"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="de.project.zigbeecontrol.StatusActivity$PlaceholderFragment" >
<TextView
android:id="#+id/welcomeTextSTATUS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="43dp"
android:text="#string/status"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/versionsOutputTextSTATUS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/versionTextSTATUS"
android:layout_alignBottom="#+id/versionTextSTATUS"
android:layout_marginLeft="24dp"
android:layout_toRightOf="#+id/versionTextSTATUS"
android:text="#string/empty"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/dbstatusOutputTextSTATUS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/dbstatusTextSTATUS"
android:layout_alignLeft="#+id/versionsOutputTextSTATUS"
android:text="#string/empty"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/beendenButtonSTATUS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/welcomeTextSTATUS"
android:layout_alignParentBottom="true"
android:layout_alignRight="#+id/welcomeTextSTATUS"
android:background="#drawable/button_trans"
android:text="#string/endeStatus"
android:onClick="onClickStatus" />
<TextView
android:id="#+id/dbRowsTextSTATUS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/beendenButtonSTATUS"
android:layout_alignRight="#+id/dbstatusTextSTATUS"
android:layout_marginBottom="26dp"
android:text="#string/dbrows"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/dbstatusTextSTATUS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="#+id/beendenButtonSTATUS"
android:text="#string/datenbankstatus"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/versionTextSTATUS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/dbstatusTextSTATUS"
android:layout_below="#+id/welcomeTextSTATUS"
android:layout_marginTop="56dp"
android:text="#string/version"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/dbRowsOutputTextSTATUS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/dbRowsTextSTATUS"
android:layout_alignBottom="#+id/dbRowsTextSTATUS"
android:layout_alignLeft="#+id/dbstatusOutputTextSTATUS"
android:text="#string/empty"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/refreshButtonSTATUS"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/welcomeTextSTATUS"
android:layout_marginBottom="17dp"
android:layout_marginLeft="31dp"
android:layout_toRightOf="#+id/welcomeTextSTATUS"
android:text="#string/refresh"
android:onClick="onClickStatus" />
</RelativeLayout>
even when its working i post the parts of the "main" programm too so you can see how i worked there :
MainActivity:
public class MainActivity extends ActionBarActivity{
//Buttons
private Button beendenButton;
private Button statusbutton;
private Button restartButton;
private Button auswertungButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
/*Zuweißung der Buttons */
beendenButton=(Button) this.findViewById(R.id.endButtonMAIN);
statusbutton=(Button) this.findViewById(R.id.statusButtonMAIN);
restartButton=(Button) this.findViewById(R.id.restartButtonMAIN);
auswertungButton=(Button)this.findViewById(R.id.auswertungButtonMAIN);
/*Fertig mit initzialisieren warten auf Eingabe*/
}
private void statusMethod() {
try{
Intent intent = new Intent(this, StatusActivity.class);
startActivity(intent);
this.finish();
}catch(Exception e){errorMessage();}
}
//.... Some uninterresting Stuff here
public void onClick(View v)
{
switch (v.getId())
{
/*Auswahl was gedrückt wurde und aufruf der Entsprechenden Methode */
case R.id.endButtonMAIN: endActivity(); break;
case R.id.statusButtonMAIN: statusMethod();break;
case R.id.restartButtonMAIN: restartMethod();break;
case R.id.auswertungButtonMAIN: sensorMethod(); break;
default: break;
}
}
}
And the two xmls from layout:
activity_main:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="de.project.zigbeecontrol.MainActivity"
tools:ignore="MergeRootFrame"
/>
and last but not least fragment_main:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/eisblumen"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="de.project.zigbeecontrol.MainActivity$PlaceholderFragment" >
<Button
android:id="#+id/endButtonMAIN"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/welcomeTextMAIN"
android:background="#drawable/button_trans"
android:text="#string/beenden"
android:onClick="onClick" />
<TextView
android:id="#+id/welcomeTextMAIN"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/endButtonMAIN"
android:layout_centerHorizontal="true"
android:text="#string/welcome"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="#+id/statusButtonMAIN"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/welcomeTextMAIN"
android:layout_centerHorizontal="true"
android:layout_marginTop="39dp"
android:background="#drawable/button_trans"
android:text="#string/status"
android:onClick="onClick" />
<Button
android:id="#+id/restartButtonMAIN"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/statusButtonMAIN"
android:layout_below="#+id/statusButtonMAIN"
android:layout_marginTop="19dp"
android:background="#drawable/button_trans"
android:text="#string/neustart"
android:onClick="onClick" />
<Button
android:id="#+id/auswertungButtonMAIN"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/restartButtonMAIN"
android:layout_below="#+id/restartButtonMAIN"
android:layout_marginTop="33dp"
android:background="#drawable/button_trans"
android:text="#string/sensoren"
android:onClick="onClick" />
</RelativeLayout>
So PLZ! why do i get a NPE when trying:
version.setText("Test");
regards
Try this..
Change this..
setContentView(R.layout.activity_status);
to
setContentView(R.layout.fragment_status);
because TextViews and Buttons are in fragment_status.xml so setContentView should refer fragment_status.xml
and remove
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
Ans same like that in MainActivity.java
Change this..
setContentView(R.layout.activity_main);
to
setContentView(R.layout.fragment_main);
and remove
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
Here is your problem
setContentView(R.layout.activity_status);
but your text view is not present in activity_status.xml. Create your Views in activity_status.xml instead of
fragment_status.xml and remove
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
In my project, im going to make a multiple choice type question. I can select the questions and answer from mysql, however, i cant do the "matching" of the answer between input answer and the data from mysql. I tried some solutions but they doesnt work as well. I need a big help on it. Below are my codes.
the java class that make multiple choice
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.normalmode);
new DataAsyncTask().execute();
}
public void onClick(View v){
inputtext = ((Button) v).getText().toString();
tv3 = (TextView)findViewById(R.id.textView3);
tv3.setText(inputtext);
if(inputtext == tv2.getText().toString()){
playerscore +=5;
} else {
playerscore +=1;
}
score.setText("Scores : " + playerscore);
new DataAsyncTask().execute();
}
class DataAsyncTask extends AsyncTask<String, String, String>{
#Override
protected String doInBackground(String... param) {
String result = DBConnector.executeQuery("SELECT * FROM questions ORDER BY RAND( ) LIMIT 1");
return result;
}
#Override
protected void onPostExecute(String result) {
question = (TextView)findViewById(R.id.textView_question);
fchoice = (Button)findViewById(R.id.Btn_choice1);
schoice = (Button)findViewById(R.id.Btn_choice2);
tchoice = (Button)findViewById(R.id.Btn_choice3);
tv2 = (TextView)findViewById(R.id.textView2);
score = (TextView)findViewById(R.id.textView_score);
try {
JSONArray jsonArray = new JSONArray(result);
JSONObject jsonData = jsonArray.getJSONObject(0);
question.setText(jsonData.getString("q_desc"));
fchoice.setText(jsonData.getString("fchoice"));
schoice.setText(jsonData.getString("schoice"));
tchoice.setText(jsonData.getString("tchoice"));
ans = jsonData.getString("q_ans");
tv2.setText(ans);
} catch(Exception e) {
Log.e("log_tag", e.toString());
}
}
}
}
three buttons are sharing same onClick in xml file by using
android:onClick="onClick"
the current problem i faced is that it always return "false" no matter i pressed which button. also, is there any way to store/pass "previous" async task data?
I have tried using internal storage but it doesnt work as well
EDIT:
my xml file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.95" >
<TextView
android:id="#+id/textView_score"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/player_score" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="0.95" >
<TextView
android:id="#+id/textView_question"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="#string/string_question"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/Btn_choice3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:text="#string/third_choice"
android:onClick="onClick" />
<Button
android:id="#+id/Btn_choice2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/Btn_submit"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:text="#string/second_choice"
android:onClick="onClick" />
<Button
android:id="#+id/Btn_choice1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/Btn_choice2"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:text="#string/first_choice"
android:onClick="onClick" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="TextView" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/textView1"
android:text="TextView" />
</RelativeLayout>
</LinearLayout
textview2 and textview3 are used to test my output and display them as text
try this if(inputtext.equals(tv2.getText().toString())) instead of if(inputtext == tv2.getText().toString())
becasue the == operator checks to see if the two strings are exactly the same object.
The .equals() method will check if the two strings have the same value.
I am using Vuforia AR sdk and want to create a button on the camera preview on the screen.
I cannot figure out where and how to add the button.
I have edit the camera_overlay_udt.xml like this.. In my layout design i have placed back button and listview.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/camera_overlay_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="#+id/headerLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="#drawable/header"
android:orientation="horizontal" >
<ImageButton
android:id="#+id/backButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:background="#android:color/transparent"
android:src="#drawable/back" />
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="match_parent" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Swipart"
android:textColor="#color/white"
android:textSize="18dp"
android:textStyle="bold" />
<ImageButton
android:id="#+id/arcstarButton"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_marginRight="10dp"
android:background="#android:color/transparent"
android:src="#drawable/star_button" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/favListingLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/headerLayout"
android:gravity="top"
android:orientation="horizontal"
android:visibility="visible" >
<ListView
android:id="#+id/favlist"
android:layout_width="120dp"
android:layout_height="match_parent"
android:layout_marginBottom="50dp"
android:layout_marginLeft="7dp"
android:cacheColorHint="#00000000" />
</LinearLayout>
<LinearLayout
android:id="#+id/bottom_bar"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"
android:background="#color/overlay_bottom_bar_background"
android:gravity="center_vertical"
android:orientation="horizontal"
android:visibility="visible"
android:weightSum="1" >
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#color/overlay_bottom_bar_separators" />
<ImageButton
android:id="#+id/camera_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="#null"
android:contentDescription="#string/content_desc_camera_button"
android:onClick="onCameraClick"
android:paddingBottom="10dp"
android:paddingTop="10dp"
android:src="#drawable/camera_button_background" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_above="#id/bottom_bar"
android:background="#color/overlay_bottom_bar_separators" />
</RelativeLayout>
after that please Edit that ImageTargets.java class
private void addOverlayView(boolean initLayout) {
// Inflates the Overlay Layout to be displayed above the Camera View
LayoutInflater inflater = LayoutInflater.from(this);
mUILayouts = (RelativeLayout) inflater.inflate(
R.layout.camera_overlay_udt, null, false);
mUILayouts.setVisibility(View.VISIBLE);
// If this is the first time that the application runs then the
// uiLayout background is set to BLACK color, will be set to
// transparent once the SDK is initialized and camera ready to draw
if (initLayout) {
mUILayouts.setBackgroundColor(Color.TRANSPARENT);
}
// Adds the inflated layout to the view
addContentView(mUILayouts, new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
// Gets a reference to the bottom navigation bar
mBottomBar = mUILayouts.findViewById(R.id.bottom_bar);
// Gets a reference to the Camera button
mCameraButton = mUILayouts.findViewById(R.id.camera_button);
mCameraButton.setVisibility(View.GONE);
favButton = (ImageButton) mUILayouts.findViewById(R.id.arcstarButton);
listview = (ListView) mUILayouts.findViewById(R.id.favlist);
backButton = (ImageButton) mUILayouts.findViewById(R.id.backButton);
backButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View paramView) {
// TODO Auto-generated method stub
finish();
}
});
listview.setVisibility(View.GONE);
galleryList = SendFile.getFavourites();
if (galleryList != null) {
gridviewAdapter = new GridviewAdapter(ImageTargets.this);
listview.setAdapter(gridviewAdapter);
}
favButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (galleryList != null && galleryList.size() > 0) {
if (listview.getVisibility() == View.GONE) {
listview.setVisibility(View.VISIBLE);
} else {
listview.setVisibility(View.GONE);
}
} else {
Toast.makeText(ImageTargets.this, "Favourites not fond",
Toast.LENGTH_LONG).show();
}
}
});
listview.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> paramAdapterView,
View paramView, int positon, long paramLong) {
SendFile.setFavourite(galleryList.get(positon));
Intent intent = new Intent(ImageTargets.this,
LoadingScreen.class);
Bundle bundle = new Bundle();
bundle.putInt("x", x_Axis);
bundle.putInt("y", y_Axis);
intent.putExtras(bundle);
startActivity(intent);
finish();
}
});
showDialogHandler = new Handler() {
public void handleMessage(Message msg) {
String aResponse = msg.getData().getString("message");
if ((null != aResponse)) {
// ALERT MESSAGE
Toast.makeText(getBaseContext(),
"Server Response: " + aResponse, Toast.LENGTH_SHORT)
.show();
showAlertDialog(aResponse);
} else {
// ALERT MESSAGE
Toast.makeText(getBaseContext(),
"Not Got Response From Server.", Toast.LENGTH_SHORT)
.show();
}
};
};
loadingDialogHandler.captureButtonContainer = mUILayouts
.findViewById(R.id.camera_button);
mUILayouts.bringToFront();
}
They showing there layouts using handlers
Start you camera preview in a normal way. Place a layout on top of it with transparent background like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:background="#ff000000"
android:layout_height="match_parent">
<ImageView
android:id="#+id/start_image_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="5dp"
android:scaleType="fitXY"
android:layout_weight="1"
android:src="#drawable/scan_image"/>
</RelativeLayout>
In java file, you can add this layout like this:
private View mStartupView;
mStartupView = getLayoutInflater().inflate(
R.layout.startup_screen, null);
// Add it to the content view:
addContentView(mStartupView, new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT));
This way you will get to see your button on top of camera preview. Hope it helps
You can add buttons in cameraoverlay layout which is in layout folder and you can initialize buttons in initAR function which is in mainactivity.
Step 1: Add the button in the camera_overlay.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/camera_overlay_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ProgressBar
style="#android:style/Widget.ProgressBar"
android:id="#+id/loading_indicator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="18dp"
android:layout_marginTop="51dp"
android:text="Button" />
</RelativeLayout>
Step 2: Edit the ImageTargets.java class
private static final String LOGTAG = "ImageTargets";
private Button b1;
Step 3: Modify the initApplicationAR() function of ImageTargets.java class
private void initApplicationAR()
{
// Create OpenGL ES view:
int depthSize = 16;
int stencilSize = 0;
boolean translucent = Vuforia.requiresAlpha();
mGlView = new SampleApplicationGLView(this);
mGlView.init(translucent, depthSize, stencilSize);
mRenderer = new ImageTargetRenderer(this, vuforiaAppSession);
mRenderer.setTextures(mTextures);
mGlView.setRenderer(mRenderer);
b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
b1.setVisibility(View.GONE);
}
});
}
Now lay back and watch your button disappear on a click!
Although it's a long time since the post.. yet I found one article.. wherein you can have the desired thing..
Ref: https://medium.com/nosort/adding-views-on-top-of-unityplayer-in-unityplayeractivity-e76240799c82
Solution:
Step1: Make a custom layout XML file (vuforia_widget_screen.xml). For example, button has been added.
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/main_layout">
<FrameLayout
android:id="#+id/unity_player_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<Button
android:id="#+id/back_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:background="#null"
android:text="#string/welcome" />
</FrameLayout>
Step 2: Make following changes in the UnityPlayerActivity.java
Replace "setContentView(mUnityPlayer);" with
setContentView(R.layout.vuforia_widget_screen);
FrameLayout frameLayout = findViewById(R.id.unity_player_layout);
frameLayout.addView(mUnityPlayer.getView());
-> For anyone, who will face the issue in future. :)
New android developer here. I am trying to create a dynamic UI that loads based on the users selection of a RadioGroup. Based on their selection, one of 3 possible fragments will be loaded into a LinearLayout section. This is my first attempt at my own sample problem that is not just a walk-through tutorial. Here is the main activity:
public class BaseConverter extends Activity {
RadioGroup convert;
Fragment toFragment;
RadioGroup toRadioGroup = null;
TextView inputDisplay = null;
TextView outputDisplay = null;
TextView resultTitle = null;
#Override
public void onCreate(Bundle sIS) {
super.onCreate(sIS);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.setContentView(R.layout.base_converter);
convert = (RadioGroup) this.findViewById(R.id.bc_convert_group);
convert.setOnCheckedChangeListener(new ConvertListener());
FragmentManager fm = getFragmentManager();
FragmentTransaction converterFragment = fm.beginTransaction();
ConvertEmptyFragment emptyTo = new ConvertEmptyFragment();
converterFragment.replace(R.id.bc_converter_fragment, emptyTo);
converterFragment.commit();
FragmentTransaction toFragment = fm.beginTransaction();
ConvertEmptyFragment emptyConverter = new ConvertEmptyFragment();
toFragment.replace(R.id.bc_to_fragment, emptyConverter);
toFragment.commit();
}
#Override
public void onResume() {
convert.clearCheck();
super.onResume();
}
#Override
public void onPause() {
convert.clearCheck();
super.onPause();
}
// I put a little null check so you can see how I'm trying to access the TextViews and what results
public void updateUIComponents(){
View converterView = this.findViewById(R.id.bc_converter_fragment);
inputDisplay = (TextView)converterView.findViewById(R.id.bc_display_input);
outputDisplay = (TextView)converterView.findViewById(R.id.bc_display_output);
if (inputDisplay == null){
Log.d("BaseConverter", "inputDisplay == null");
} else {
Log.d("BaseConverter", "inputDisplay != null");
}
}
class ConvertListener implements OnCheckedChangeListener {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
Fragment toFragment;
Fragment converterFragment;
switch (checkedId) {
case R.id.bc_convert_binary:
toFragment = new ConvertRBFragmentBinary();
converterFragment = new ConverterFragmentBinary();
break;
case R.id.bc_convert_decimal:
toFragment = new ConvertRBFragmentDecimal();
converterFragment = new ConverterFragmentDecimal();
break;
case R.id.bc_convert_hex:
toFragment = new ConvertRBFragmentHex();
converterFragment = new ConverterFragmentHex();
break;
default:
toFragment = new ConvertEmptyFragment();
converterFragment = new ConvertEmptyFragment();
break;
}
FragmentManager fm = getFragmentManager();
FragmentTransaction converterTransaction = fm.beginTransaction();
converterTransaction.replace(R.id.bc_converter_fragment, converterFragment);
converterTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
converterTransaction.commit();
FragmentTransaction toTransaction = fm.beginTransaction();
toTransaction.replace(R.id.bc_to_fragment, toFragment);
toTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
toTransaction.commit();
updateUIComponents();
}
}
So, based on what a user chooses, the proper fragments will be loaded into the respective LinearLayout sections. However, now I want to implement the business logic of the fragments (which is just integer base conversion; i.e. binary number to decimal...) but when I try to access the TextViews, as seen in the updateUIComponents method, I get null pointers. What am I missing?
Here's the ConverterFragmentBinary class for reference:
public class ConverterFragmentBinary extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle sIS){
View v = inflater.inflate(R.layout.converter_fragment_binary, container, false);
return v;
}
}
and its respective xml layout for reference:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FF000000"
android:gravity="center_horizontal"
android:orientation="vertical" >
<ImageView
android:id="#+id/bc_binary_converter_logo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="15dip"
android:maxHeight="30dip"
android:src="#drawable/binary_converter" />
<TextView
android:id="#+id/bc_display_input"
style="#style/input_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dip"
android:layout_marginLeft="15dip"
android:layout_marginRight="15dip"
android:layout_marginTop="5dip"
android:gravity="center_vertical|right"
android:lines="1"
android:minHeight="30sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FF000000"
android:gravity="center_horizontal"
android:orientation="horizontal" >
<Button
android:id="#+id/button_num_0"
style="#style/op_button_land"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dip"
android:gravity="center"
android:onClick="num0"
android:text="#string/num_0" />
<Button
android:id="#+id/button_num_1"
style="#style/op_button_land"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dip"
android:gravity="center"
android:onClick="num1"
android:text="#string/num_1" />
</LinearLayout>
<TextView
android:id="#+id/bc_result_title"
style="#style/radio_button_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dip"
android:layout_marginRight="5dip"
android:layout_marginTop="10dip"
android:gravity="left"
android:text="#string/choose_convert" />
<TextView
android:id="#+id/bc_display_output"
style="#style/display_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="15dip"
android:layout_marginRight="15dip"
android:layout_marginTop="5dip"
android:gravity="center_vertical|right"
android:lines="1"
android:minHeight="30sp" />
</LinearLayout>
and then heres the main activity it gets loaded into:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/base_conversion_layout"
style="#style/layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="5"
android:baselineAligned="false"
android:gravity="center_vertical|left"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="2"
android:orientation="vertical" >
<TextView
style="#style/radio_button_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/convert" />
<RadioGroup
android:id="#+id/bc_convert_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:padding="5dip" >
<RadioButton
android:id="#+id/bc_convert_binary"
style="#style/radio_button"
android:text="#string/binary" />
<RadioButton
android:id="#+id/bc_convert_decimal"
style="#style/radio_button"
android:text="#string/decimal" />
<RadioButton
android:id="#+id/bc_convert_hex"
style="#style/radio_button"
android:text="#string/hex" />
</RadioGroup>
</LinearLayout>
<LinearLayout
android:id="#+id/bc_to_fragment"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="3"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/bc_converter_fragment"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="13"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
Thanks in advance and sorry for the long code blocks but I figured it was better to include more than less.
Also, you should inflate your Fragments layout to bring it from your XML to your Java code instead of simply referring it using findViewById() method.
So instead of doing this,
View converterView = this.findViewById(R.id.bc_converter_fragment);
Do this inside your onCreateView method of the fragment,
View converterView = infalter.inflate(R.id.bc_converter_fragment,null);
updateUIComponents(converterView);//call this methid and pass your view
new method looks like this,
public void updateUIComponents(View converterView){
inputDisplay = (TextView)converterView.findViewById(R.id.bc_display_input);
outputDisplay = (TextView)converterView.findViewById(R.id.bc_display_output);
if (inputDisplay == null){
Log.d("BaseConverter", "inputDisplay == null");
} else {
Log.d("BaseConverter", "inputDisplay != null");
}
}