So i have this button that I would like it to open a webviewer when the button is pressed.
Here is the xml where the button is
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageButton
android:id="#+id/signIn"
android:layout_width="match_parent"
android:layout_height="61dp"
android:src="#drawable/signin"
android:textAlignment="center" />
</LinearLayout>
Here the class code for the click button
public class SignIn extends Activity {
ImageView img;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
img = (ImageView) findViewById(R.id.signIn);
signIn();
}
public void signIn() {
img.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(SignIn.this, WebViewActivity.class);
startActivity(intent);
}
});
}
}
here is where i have the webviwer.xml
<?xml version="1.0" encoding="utf-8"?>
<WebView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/webView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
And here is the webviewer class
public class WebViewActivity extends Activity{
private WebView webView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webview);
webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("http://www.google.com");
}
}
When click nothing happens, I also edited the manifest to have internet access
Make a small correction. In XML you are using "ImageButton" but in java file your are using "ImageView".
<ImageView
android:id="#+id/signIn"
android:layout_width="match_parent"
android:layout_height="61dp"
android:src="#drawable/signin"
android:textAlignment="center" />
I think it is wrong to write in XML ImageButton and in java file to search for an ImageView by id.
Use an ImageView or an ImageButton!
if you want to use an imageView don forget to make it clicable.
Related
This is my first time to use PreferenceActivity.
I have made a simple activity for a settings screen, and when I set up a button in the layout and set the onClickListener for the button, there are no actions nor are there any errors.
All I want to do is to send the user back to the main screen by pressing the button. Is there some error or some setup that I have missed?
The mysterious part is that neither the xml onClick nor the direct method call work. No actions, no errors, it does not even show a Toast (when altered for debugging). Is there anyone who actually used PreferenceActivity and used some widgets like buttons ?
Here is my sample activity for the Settings Screen
public class Settings extends PreferenceActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
//This button doesn't work
Button b = (Button)findViewById(R.id.setupid);
b.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
Intent i = new Intent(Settings.this,HomeActivity.class);
startActivity(i);
}
});
getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();
}
public static class MyPreferenceFragment extends PreferenceFragment
{
#Override
public void onCreate(final Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
}
}
}
Here is the xml layout for the Settings.java
<?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"
>
<ListView android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="5" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#3498db"
android:gravity="center"
>
<Button
android:layout_width="wrap_content"
android:layout_height="50dp"
android:text="Set"
android:id="#+id/setupid" />
</LinearLayout>
</LinearLayout>
You didn't have to use the Fragment in the first place. All you have to do is to use addPreferencesFromResource(R.xml.preferences); under setContents View.
public class Settings extends PreferenceActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
//It is depricated but it works
addPreferencesFromResource(R.xml.preferences);
Button b = (Button)findViewById(R.id.setupid);
b.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
Intent i = new Intent(Settings.this,HomeActivity.class);
startActivity(i);
}
});
//getFragmentManager().beginTransaction().replace(android.R.id.content, //new MyPreferenceFragment()).commit();
}
}
I placed a Button in a layout
here is my xml code
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="#ff0000"/>
and wrote the following code in activity:
public class Basic extends Activity {
Button btn;
public void oncreate(Bundle b) {
super.onCreate(b);
setContentView(R.layout.first);
btn = (Button) findViewById(R.id.button1);
}
public void clkBtn(View v) {
Toast.makeText(this, "hai.........", Toast.LENGTH_SHORT).show();
}
}
When I run this code, I am getting white blank screen (without any button). Can any one tell me what is wrong with my code?
Update your first.xml under res->layout folder like this
<?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="match_parent"
android:gravity="center"
android:orientation="vertical" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="clkBtn"
android:text="Click Me" />
</LinearLayout>
To get the Button event you need to first register your Button for that. The code which you have written is right but to invoke that method you have to add the property android:onClick="clkBtn" in your layout file.
OR
If you don't want to use this way then you can also explicitly invoke the event by registering your Button in your class as below:
public class Basic extends Activity {
Button btn;
public void oncreate(Bundle b) {
super.onCreate(b);
setContentView(R.layout.first);
btn = (Button) findViewById(R.id.button1);
btn.setOnClickListener(this);
}
#Override
public void onClick(View v) {
Toast.makeText(this, "hai.........", Toast.LENGTH_SHORT).show();
}
}
And also to launch your activity make sure have added your activity as launcher in your manifest file as below .
<activity android:label="#string/app_name"
android:name="Basic" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
This is My Answer. In XML file Button should be like this:
<Button
android:id="#+id/ID of you button "
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Name To Display Button name" />
In the MainActivity OR In any activity (in which you have called XML):
public class MainActivity extends Activity {
public void oncreate(Bundle paramBundle) {
super.onCreate(paramBundle);
setContentView(R.layout."Your XML file in which Button is.");
Button btn = (Button)findViewById(R.id."Your button Id");
btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//Do your onclick program here
}
});
}
}
when I send strings via put extra the underlined words will not be underlined
<string name="s_hello_txt">\n{ <u>hello all</u> }\n</string>
MainActivity Button Code
public void c_hello(View v){
Intent hello= new Intent(MainActivity.this,
MainTextActivity.class);
intent_collection_e3tiraf.putExtra("key",getResources().getString(R.string.s_hello_txt));
startActivity(hello);
finish();
}
MainActivityText onCreate Code
textview = (TextView) findViewById(R.id.id_text_txt);
Intent n = getIntent();
String mrng = n.getStringExtra("key");
textview.setText(mrng);
if I put a text with direct string it will be underlined
For Example if I put in the layout of MainActivityText(activity_maintext.xml)
<TextView
android:id="#+id/id_dailyprayers_txt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/s_hello_txt"
android:textSize="30sp" />
the textview in MainActivityText Show the text(hello all) underlined
any help!!!!
As long as the string still has the underline html you should be able to utilize the Html.fromHtml method to style the string.
textview.setText(Html.fromHtml(mrng));
Actually, the string getResource().getString(R.string.s_hello_txt) is not be underlined.
The best way to add html source code in strings.xml is to use <![CDATA[html source code]]>. Here is an example:
<string name="s_hello_txt"><![CDATA[<u>Text</u>]]></string>
And then use Html.fromHtml(mrng) to show the underlined string
// Try This One This Will Help For Your Acheivement
**String.xml**
<string name="s_hello_txt"><br/>{ <u>hello all</u> }<br/></string>
**activity_main1.xml**
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/txtValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/s_hello_txt"/>
<Button
android:id="#+id/btnClick"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="GoTo Second Activity"/>
</LinearLayout>
**MainActivity1 Activity**
public class MainActivity1 extends Activity {
private Button btnClick;
private TextView txtValue;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main1);
txtValue = (TextView)findViewById(R.id.txtValue);
btnClick = (Button)findViewById(R.id.btnClick);
txtValue.setText(Html.fromHtml(getString(R.string.s_hello_txt)));
btnClick.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intent = new Intent(MainActivity1.this, MainActivity2.class);
intent.putExtra("EXTRA",getString(R.string.s_hello_txt));
startActivity(intent);
}
});
}
}
**activity_main2.xml**
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/txtValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
**MainActivity2 Activity**
public class MainActivity2 extends Activity {
private TextView txtValue;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
txtValue = (TextView)findViewById(R.id.txtValue);
txtValue.setText(Html.fromHtml(getIntent().getStringExtra("EXTRA")));
}
}
Am quite new to Android programming and hope someone can help me out in this:
1. I am coding from one of the demos here:
http://developer.android.com/training/animation/screen-slide.html
I have a main activity_screen_slide.xml file:
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
In another xml file, main.xml, I have a few buttons.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/Main"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<Button
android:id="#+id/buttonStart"
android:text="test"/>
</LinearLayout>
Within the main java activity file, the context is set as following:
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_screen_slide);
When I tried to set a listener for testButton, am unable to do so. This means that when the button is generated subsequently (through an inflator in another java file), there is no response when I click the button.
The java file to generate the inflator is simply:
ViewGroup rootView;
rootView = (ViewGroup) inflater.inflate(R.layout.main, container, false);
Thank you and appreciate your help
Cheers
D
I assume your button is defined in your xml layout activity_screen_slide.xml similar to this:
<Button
android:id="#+id/myButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
In your Activity you can add a ClickListener like this:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button myButton = (Button) findViewById(R.id.myButton);
myButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Log.i("", "I've been clicked");
}
});
}
Try this:
public class Settings extends Activity implements View.OnClickListener {
public void onCreate(Bundle savedInstanceState) {
//...ALL THE OTHER CODE..\\
Button button = (Button) findViewById(R.id.YOUR_BUTTON_ID);
button.setOnClickListener(this);
}
#Override
public void onClick(View view) {
switch (view.getId()){
case R.id.YOUR_BUTTON_ID: {
ALPHA.YourFunction(parameters);
}
}
}
}
I am making a really simple android application that will display a picture after a button is clicked. I have searched for days and tried everything I can think of but cant seem to get it to work. I have been able to host the picture online and link to it but I want the content available offline too. Please help, sorry for the stupid question.
Update:
It is a fixed image and in my drawable resource. Here is the current code I am using to display the image from a URL. What changes should I make to to display that same image from my drawable resource?
JAVA
public class StandingOrders extends Activity
{
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void buttonClick (View image)
{
Uri uri = Uri.parse("my url");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent)
}
}
XML
<Button android:id="#+id/btn1"
android:layout_height="wrap_content"
android:layout_width="170px"
android:text="The Button"
android:layout_gravity="center"
android:clickable="true"
android:onClick="buttonClick">
</Button>
If it's a fixed image, include it as a drawable resource and use an ImageView to display it. If it's an image to download, you can do that in a separate thread and store it in a file or an SQLite data base, then again use an ImageView to see it.
Add an ImageView to your xml layout and call setImageResource from onClick.
setImageResource(R.drawable.yourImage);
Or you could set the image in your layout and make the ImageView hidden until you click the button. See setVisibility(View.GONE)
Check out this answer: https://stackoverflow.com/a/4896272/458968
In your case, the uri should be
Uri.parse("android.resource://com.company.app/"+R.drawable.my_image);
You can try to implement the method, which I am posting below. I have done something more or less similar to your requirement.
Method:
//method to zoom images
public void zoomImage(String imageUrl)
{
AlertDialog.Builder builder;
Context mContext = ExamActivity.this;
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.custom_dialog,
(ViewGroup) findViewById(R.id.layout_root));
//to close dialog
ImageView close_dialog = (ImageView) layout.findViewById(R.id.imageView_custom_dialog_close);
close_dialog.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
alertDialog.dismiss();
}
});
//to show image
WebView wv=(WebView) layout.findViewById(R.id.show_image_webView);
wv.getSettings().setBuiltInZoomControls(true);
wv.setInitialScale(200);
wv.loadUrl(imageUrl);
builder = new AlertDialog.Builder(mContext);
builder.setView(layout);
alertDialog = builder.create();
alertDialog.show();
}
the imageUrl is the url to the webpage containing the image. If you want to show a local image then just create a simple html page containing the image and use the local url.
Try this:-
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ImageView imageToDisplay = (ImageView) findViewById(R.id.imageToDisplay);
Button btnShowImage = (Button) findViewById(R.id.btnShowImage);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
imageToDisplay.setVisibility(View.VISIBLE);
imageToDisplay.setImageResource(R.drawable.imagelogo);
}
});
}
}
In layout imageToDisplay's visibility is gone.
try following example
you can download "android-query-0.22.10.jar" file from following url.
http://www.java2s.com/Code/Jar/a/Downloadandroidquery02210jar.htm
main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.addbuttondynamic.AddButtonDynamic" >
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Load Image" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
and Main.java
import com.androidquery.AQuery;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
public class Main extends Activity {
Button btnLoad;
ImageView ivImage;
AQuery aQuery;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnLoad=(Button)findViewById(R.id.button1);
ivImage=(ImageView)findViewById(R.id.imageView1);
aQuery=new AQuery(this);
btnLoad.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
//load image from /res folder.
ivImage.setImageResource(R.drawable.ic_launcher);
//load image from url.
aQuery.id(ivImage).image("you URL");
// if ivImage is not working in aQuery.id() then use R.id.imageView1.
}
});
}
}
activity_main.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: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="com.example.imagechange.MainActivity"
>
<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_marginTop="10dp"
android:text="#string/khilan"
android:onClick="btnOnClick"
/>
<ImageView
android:id="#+id/imageView1"
android:layout_width="800px"
android:layout_height="500px"
android:layout_marginTop="70dp"/>
</RelativeLayout>
MainActivity.java
public class MainActivity extends Activity
{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void btnOnClick (View view)
{
String imagename = "khilan";
int res = getResources().getIdentifier(imagename, "drawable", getPackageName());
ImageView iv = (ImageView) findViewById(R.id.imageView1);
iv.setImageResource(res);
}
}
Create a layout with image and button, make the image hidden and onClick set the visibility to VISIBLE.
Here is what the XML should look like:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/image"
android:src="#drawable/image1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"/>
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show Image" />
</RelativeLayout>
and the following is the Java code
ImageView image = findViewById(R.id.image);
Button button = findViewById(R.id.got_it_button);
image.setVisibility(View.GONE);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
image.setVisibility(View.VISIBLE);
}
});
Good luck :)