I am trying to programmatically create a centered button that would print a word when pressed.
I have used Gravity for this, however I am getting 2 errors:
eglSurfaceAttrib not implemented
Failed to set EGL_SWAP_BEHAVIOR on surface 0xae0ee360, error=EGL_SUCCESS
Below is my code:
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.FrameLayout;
public class MainActivity extends ActionBarActivity {
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/////////////
#Override
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.activity_main);
final ViewGroup vg1 = (ViewGroup) findViewById(android.R.id.content);
float w1 = vg1.getWidth();
float h1 = vg1.getHeight();
final Button b1 = new Button(this);
b1.setText("");
float left = (w1 - vg1.getWidth())/2;
float top = (h1 - vg1.getHeight())/2;
FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams((int)w1/2, (int)h1/2);
layoutParams.setMargins( (int)left, (int)top, (int)(left+w1/2), (int)(top+h1/2));
layoutParams.gravity = Gravity.CENTER;
b1.setLayoutParams(layoutParams);
vg1.addView(b1, layoutParams);
b1.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
b1.setText("TestTest");
}
});
}
and the xml:
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
Please, help me find my mistake.
I just started learning android development, not really experienced in this.
Thank you!
In order to get the height and width of your layout you need to wait for the measure() pass (more information here https://developer.android.com/guide/topics/ui/how-android-draws.html).
You can add a listener on your layout for example:
gv1.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
// execute your code here, after height and width have been calculated
}
}
);
Related
My app's MainActivity has a ViewPager which has three children(swipe views). When swiped to last child, the ActionBar gets two menu items. On clicking one item, a Dialog pops up to add a name of an item into a Database. On clicking second menu item, another Dialog pops up that prompts user to enter the name of the item that is to be removed from the Database. These Dialogs are getting constructed by separate Dialog Fragments. Basically what I want is to get the callback event from the Dialog that the positive or negative button has been clicked and wanna perform some action in the fragment which is as I mentioned is the last child of my ViewPager. I've seen the Android documentation as well as a Youtube video to learn how to implement the interface, yet my app's crashing.
Here's the code for my DialogFragment which shows a Dialog that prompts the user to enter input and save it to the Database.
package com.example.android.mybusiness;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class AddCigaretteNameDialog extends DialogFragment {
EditText userInput;
String cigaretteName;
DbHelper dbHelper;
public AddCigaretteNameDialogListener listener;
public interface AddCigaretteNameDialogListener {
void onDialogPositiveClick(String name);
}
#NonNull
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
dbHelper = new DbHelper(getContext());
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
// SET THE TITLE FOR THE DIALOG.
builder.setTitle(R.string.add_title);
// GET THE LAYOUT INFLATOR
LayoutInflater inflater = getActivity().getLayoutInflater();
// INFLATE THE LAYOUT AND PUT IT INTO A VARIABLE.
// PASS NULL AS PARENT VIEW, BECAUSE IT'S GOING IN THE DIALOG
View view = inflater.inflate(R.layout.edit_text_for_dialogs, null);
// GET THE EDIT_TEXT FROM THE 'VIEW' VARIABLE.
userInput = view.findViewById(R.id.cigarette_name_user_input);
// SET THE LAYOUT FOR THE DIALOG
builder.setView(view);
// SET ACTION BUTTONS
builder.setPositiveButton(R.string.save, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
// GET THE USER INPUT FROM THE EDIT_TEXT ABOVE AND PUT IT INTO A VARIABLE.
cigaretteName = userInput.getText().toString();
// PUT THE USER INPUT IN THE DATABASE.
Boolean result = dbHelper.insertCigaretteName(cigaretteName);
if (result) {
// SHOW SUCCESS MESSAGE THAT CIGARETTE NAME HAS BEEN INSERTED.
Toast.makeText(getContext(), cigaretteName + " has been added successfully!", Toast.LENGTH_SHORT).show();
listener.onDialogPositiveClick(cigaretteName);
} else {Toast.makeText(getContext(), "Something is wrong", Toast.LENGTH_SHORT).show();}
}
})
.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dismiss();
}
});
// RETURN THE DIALOG.
return builder.create();
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
// VERIFY THAT THE HOST ACTIVITY IMPLEMENTS THE CALLBACK INTERFACE
try {
listener = (AddCigaretteNameDialogListener) getTargetFragment();
} catch (ClassCastException e){
// THE ACTIVITY DOESN'T IMPLEMENT INTERFACE, THROW AN EXCEPTION.
throw new ClassCastException(getActivity().toString() + " must implement listener");
}
}
}
And here's the fragment which is the last child of the view pager.
package com.example.android.mybusiness;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;
/**
* A simple {#link Fragment} subclass.
*/
public class Purchase extends Fragment implements AddCigaretteNameDialog.AddCigaretteNameDialogListener {
Spinner spinner;
DbHelper dbHelper;
ArrayAdapter<String> arrayAdapter;
// FRAGMENT'S CONSTRUCTOR.
public Purchase() { }
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// KIND OF REQUIREMENT FOR OPTION MENUS.
setHasOptionsMenu(true);
// INSTANTIATING THE OBJECT TO RUN A FUNCTION, WHICH GETS THE CIGARETTES NAME.
dbHelper = new DbHelper(getContext());
// Inflate the layout for this fragment
// AND PUT IT INTO A VARIABLE SO WIDGETS CAN BE ACCESSED.
View view = inflater.inflate(R.layout.fragment_purchase, container, false);
// FIND THE spinner.
spinner = view.findViewById(R.id.spinner);
// CREATING THIS ADAPTER TO POPULATE THE SPINNER WIDGET.
arrayAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, dbHelper.getAllCigaretteNames());
// SETTING THE ADAPTER TO THE SPINNER, WHICH WILL PROVIDE THE CONTENT TO BE SELECTED BY ME.
spinner.setAdapter(arrayAdapter);
return view;
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.add_cigarette:
AddCigaretteNameDialog addCigaretteNameDialog = new AddCigaretteNameDialog();
addCigaretteNameDialog.show(getFragmentManager(), "add_cigarette_name");
return true;
case R.id.remove_cigarette:
RemoveCigaretteNameDailog RemoveCigaretteNameDailog = new RemoveCigaretteNameDailog();
RemoveCigaretteNameDailog.show(getFragmentManager(), "add_cigarette_name");
; return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
public void onDialogPositiveClick(String name) {
arrayAdapter.add(name);
}
}
Here's the crash log:
12-07 13:13:59.278 25327-25327/com.example.android.mybusiness
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.android.mybusiness, PID: 25327
java.lang.NullPointerException: Attempt to invoke interface method 'void
com.example.android.mybusiness.AddCigaretteNameDialog$AddCigaretteNameDialogListener.onDialogPositiveClick(java.lang.String)'
on a null object reference
at com.example.android.mybusiness.AddCigaretteNameDialog$2.onClick(AddCigaretteNameDialog.java:58)
at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:162)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5296)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:707)
Line 58 is
listener.onDialogPositiveClick(cigaretteName);
Thanks in advance!
If you use custom dialog class with custom view this would solve your problem. I am posting a code below which shows a custom dialog with views. first of all create a layout file for your dialog design by name dlg_add_cigarette_name inside layout folder
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:background="#drawable/dialog_background_inset"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layout_marginLeft="16dp"
android:text="Cigrate Name:"
android:id="#+id/tv_label_total"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/layout_total_update"
android:orientation="horizontal"
android:layout_below="#+id/tv_label_total"
android:weightSum="2"
>
<EditText
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.5"
android:layout_marginLeft="16dp"
android:layout_marginRight="10dp"
android:id="#+id/et_cgrate_name"
android:inputType="text"
/>
</LinearLayout>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/layout_total_update"
android:layout_alignParentRight="true"
android:background="#android:color/transparent"
android:layout_marginRight="70dp"
android:text="OK"
android:layout_marginBottom="20dp"
android:layout_marginTop="20dp"
android:id="#+id/button_ok"
android:textColor="#color/colorPrimaryDark"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/layout_total_update"
android:layout_toLeftOf="#+id/button_ok"
android:layout_marginRight="30dp"
android:text="Cancel"
android:layout_marginBottom="20dp"
android:layout_marginTop="20dp"
android:background="#android:color/transparent"
android:id="#+id/button_cancel"
android:textColor="#color/colorPrimaryDark"
/>
Now inside drawable folder create a new file by name dialog_background_insetand update the file by following code
<?xml version="1.0" encoding="utf-8"?>
<inset
xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="#color/white"
android:insetRight="15dp"
android:insetLeft="15dp">
</inset>
and now in your AddCigaretteNameDialog file update the class by following code
import android.annotation.SuppressLint;
import android.app.Dialog;
import android.content.Context;
import android.content.res.Resources;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentManager;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.drinkwater.reminder.watertracker.R;
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
import butterknife.Unbinder;
public class AddCigaretteNameDialog extends DialogFragment {
private static final float DIM_AMOUNT = 0.4f;
#BindView(R.id.tv_label_total)
TextView tvLabelTotal;
#BindView(R.id.et_cgrate_name)
EditText etCgrateName;
#BindView(R.id.layout_total_update)
LinearLayout layoutTotalUpdate;
#BindView(R.id.button_ok)
Button buttonOk;
#BindView(R.id.button_cancel)
Button buttonCancel;
#OnClick(R.id.button_cancel)
public void onClick(){
dismiss();
}
#OnClick(R.id.button_ok)
public void onClickOkay(){
unitCallBack.addCigarette(cigaretteName);
}
private Unbinder mUnbinder;
private AddCigaretteName unitCallBack;
private String cigaretteName;
public AddCigaretteNameDialog() {
}
public static AddCigaretteNameDialog newInstance(String title) {
AddCigaretteNameDialog frag = new AddCigaretteNameDialog();
Bundle args = new Bundle();
args.putString("title", title);
frag.setArguments(args);
return frag;
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (unitCallBack == null && context instanceof AddCigaretteName) {
unitCallBack = (AddCigaretteName) context;
}
}
#Override
public void onDetach() {
super.onDetach();
unitCallBack = null;
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Dialog dialog = super.onCreateDialog(savedInstanceState);
final Window window = dialog.getWindow();
if (window != null) {
window.requestFeature(Window.FEATURE_NO_TITLE);
window.setBackgroundDrawableResource(android.R.color.transparent);
WindowManager.LayoutParams windowLayoutParams = window.getAttributes();
windowLayoutParams.dimAmount = DIM_AMOUNT;
}
dialog.setCancelable(false);
dialog.setCanceledOnTouchOutside(false);
return dialog;
}
#SuppressLint("NewApi")
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.test, container, false);
mUnbinder = ButterKnife.bind(this, view);
etCgrateName.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
cigaretteName=s.toString();
}
#Override
public void afterTextChanged(Editable s) {
}
});
return view;
}
#Override
public void onResume() {
super.onResume();
final int width = getScreenWidth();
int height = getScreenHeight() / 2;
changeWindowSizes(width, ViewGroup.LayoutParams.WRAP_CONTENT);
}
private void changeWindowSizes(int width, int height) {
final Window window = getDialog().getWindow();
if (window != null) {
window.setLayout(width, height);
}
}
#Override
public void onDestroyView() {
super.onDestroyView();
mUnbinder.unbind();
}
#Override
public int getTheme() {
return R.style.CustomDialog;
}
public interface AddCigaretteName {
void addCigarette(String name);
}
public static int getScreenWidth() {
return Resources.getSystem().getDisplayMetrics().widthPixels;
}
public static int getScreenHeight() {
return Resources.getSystem().getDisplayMetrics().heightPixels;
}
}
create a custom theme inside styles file
<style name="CustomDialog" parent="Theme.AppCompat.Light.Dialog">
<item name="android:windowAnimationStyle">#style/CustomDialogAnimation</item>
</style>
<style name="CustomDialogAnimation">
<item name="android:windowEnterAnimation">#anim/translate_left_side</item>
<item name="android:windowExitAnimation">#anim/translate_right_side</item>
</style>
create a package anim inside resfolder and create two files translate_left_sideand translate_right_side
translate_right_side
<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
android:fromXDelta="0%" android:toXDelta="100%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="600"/>
translate_left_side
<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="600"
android:fromXDelta="100%"
android:toXDelta="0%"/>
Your AddCigrateDialog is ready to appear.Now its time to call this dialog from button click.Inside Purchase make an object of AddCigaretteDialog class globally
AddCigaretteNameDialog addCigaretteNameDialog;
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.add_cigarette:
addCigaretteNameDialog= new AddCigaretteNameDialog();
addCigaretteNameDialog= AddCigaretteNameDialog.newInstance("AddCigrateNameDialog");
addCigaretteNameDialog.show(manager,"show");
return true;
case R.id.remove_cigarette:
RemoveCigaretteNameDailog RemoveCigaretteNameDailog = new RemoveCigaretteNameDailog();
RemoveCigaretteNameDailog.show(getFragmentManager(), "add_cigarette_name");
; return true;
default:
return super.onOptionsItemSelected(item);
}
}
And yes don't forget to implement the interface of AddCigaretteDialog inside Purchase dialog
As I am using ButterKnife dependency add the following lines inside your app's gradle file
inal BUTTER_KNIFE_VERSION = "8.8.1"
implementation "com.jakewharton:butterknife:$BUTTER_KNIFE_VERSION"
annotationProcessor "com.jakewharton:butterknife-compiler:$BUTTER_KNIFE_VERSION"
I am currently working on an accessibility service, which has two views. A button and a simple colored view. The colored view appears/disappears when i touch the button.
This is the code for the service -
package com.hardik.accessibiltyservicetest;
import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.FingerprintGestureController;
import android.graphics.PixelFormat;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.view.accessibility.AccessibilityEvent;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import in.championswimmer.sfg.lib.SimpleFingerGestures;
public class Service extends AccessibilityService {
FrameLayout mLayout;
WindowManager.LayoutParams lp;
LayoutInflater inflater;
WindowManager wm;
#Override
public void onAccessibilityEvent(AccessibilityEvent event) {
}
#Override
public void onInterrupt() {
}
#Override
protected void onServiceConnected() {
// Create an overlay and display the action bar
wm = (WindowManager) getSystemService(WINDOW_SERVICE);
mLayout = new FrameLayout(this);
lp = new WindowManager.LayoutParams();
lp.type = WindowManager.LayoutParams.TYPE_ACCESSIBILITY_OVERLAY;
lp.format = PixelFormat.TRANSLUCENT;
lp.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
lp.width = WindowManager.LayoutParams.MATCH_PARENT;
lp.height = WindowManager.LayoutParams.MATCH_PARENT;
lp.gravity = Gravity.CENTER;
inflater = LayoutInflater.from(this);
inflater.inflate(R.layout.action_bar, mLayout);
wm.addView(mLayout, lp);
configurePowerButton();
}
boolean is = true;
private void configurePowerButton() {
SimpleFingerGestures obj = new SimpleFingerGestures();
obj.setDebug(true);
obj.setConsumeTouchEvents(true);
obj.setOnFingerGestureListener(new SimpleFingerGestures.OnFingerGestureListener() {
#Override
public boolean onSwipeUp(int i, long l, double v) {
Log.e("Swipe", "Up "+i);
return false;
}
#Override
public boolean onSwipeDown(int i, long l, double v) {
return false;
}
#Override
public boolean onSwipeLeft(int i, long l, double v) {
return false;
}
#Override
public boolean onSwipeRight(int i, long l, double v) {
return false;
}
#Override
public boolean onPinch(int i, long l, double v) {
return false;
}
#Override
public boolean onUnpinch(int i, long l, double v) {
return false;
}
#Override
public boolean onDoubleTap(int i) {
return false;
}
});
Button powerButton = mLayout.findViewById(R.id.power);
final View img = mLayout.findViewById(R.id.view);
powerButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//performGlobalAction(GLOBAL_ACTION_POWER_DIALOG);
Toast.makeText(getApplicationContext(), "yus", Toast.LENGTH_SHORT).show();
if (is){
is = false;
img.setVisibility(View.GONE);
}
else{
is =true;
img.setVisibility(View.VISIBLE);
}
}
});
img.setOnTouchListener(obj);
}
}
and this is the layout file -
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<Button
android:id="#+id/power"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginTop="32dp"
android:background="#80FFFFFF"
android:text="Test"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<View
android:id="#+id/view"
android:layout_width="300dp"
android:layout_height="300dp"
android:background="#000000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
the touch event and all works fine. but the problem is that with the current windowmanager parameter length and breadth set to match parent, the overlay blocks touch events to android ui itself, in other words no part of the android ui will respond unless the overlay is stopped, since the overlay consumes all the touch input. And the biggest setback is that i want the overlay to be just like i designed in the layout, and by setting any other length and breadth parameter the background touch problem starts, that is it once again starts consuming the touch events.
It isn't consuming all the touch events when i set the parameters to wrap content, but that doesn't give me the required ui of the service.
Also don't mind the use of gesture library, the code is a part of my personal project.
thanks in advance.
i found a fix. just make separate layouts for each element
I had a gridview activity where I was populating the gridview with a custom object (a picture with some custom methods and an onclick listener). I could change the gridview size from the preferences menu. Everything worked beautifully.
I have since added some complexity to the code. Instead of using the normal Activity class, I am now using the FragmentActivity class, a fragmentPageAdapter, and a fragment to which my gridview is bound. This is because eventually I want the app to allow the user "swipe" from fragment to fragment.
Since using the fragment in this way, I am noticing a repeatable bug whenever I try to resize the gridview from the preferences menu: some of the objects get resized properly, other elements do not resize. Instead, they keep the same size that they had prior to changing the preference. Here is a screenshot:
This only happens when I try resizing from the preferences menu. Other calls to my resize method, such as on a configuration change, resize all of the gridview elements correctly.
I would appreciate any suggestions!
Here is my Code:
MAIN ACTIVITY:
package com.KhalidSorensen.animalsounds;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.GridView;
public class MainActivity extends FragmentActivity implements OnSharedPreferenceChangeListener{
private MyFragment m_myFragment = new MyFragment();
private ViewPager m_viewPager;
private static SharedPreferences m_prefs;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
m_prefs = PreferenceManager.getDefaultSharedPreferences(this);
m_prefs.registerOnSharedPreferenceChangeListener(this);
setContentView(R.layout.activity_main);
m_viewPager = (ViewPager) findViewById(R.id.pager);
m_viewPager.setAdapter(new MyAdapter(getSupportFragmentManager(), m_myFragment));
}
#Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
Log.i("Khalid","MainActivity: onSharedPreferenceChanged");
if (key.equals("key_prefs_enable_lscape")){
//do nothing for now
}else if (key.equals("key_prefs_picture_size")){
SetColumnWidth(m_myFragment.getM_gridView());
}
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
Log.i("Khalid","FragAnimalSounds: onConfigurationChanged");
SetColumnWidth(m_myFragment.getM_gridView());
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
Log.i("Khalid","MainActivity: onCreateOptionsMenu");
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.options_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.lbl_opt_menu_settings:
Intent i = new Intent("android.intent.action.PREFERENCES");
startActivity(i);
break;
case R.id.lbl_opt_menu_quit:
finish();
break;
default:
finish();
break;
}
return true;
}
public static void SetColumnWidth(GridView GV) {
Log.i("Khalid","MainActivity: SetColumnWidth");
int NumColumns, DesiredColumnWidth;
//Get the desired number of columns from the key prefs
NumColumns = Integer.parseInt(m_prefs.getString("key_prefs_picture_size","2"));
//Determine the desired column width
if (NumColumns == 1){
DesiredColumnWidth = 200;
}else if (NumColumns == 2){
DesiredColumnWidth = 100;
}else{
DesiredColumnWidth = 50;
}
//Set the desired column width
GV.setColumnWidth(DesiredColumnWidth);
}
}
class MyAdapter extends FragmentPagerAdapter{
Fragment m_frag_A = null;
public MyAdapter(FragmentManager fm, Fragment A) {
super(fm);
m_frag_A = A;
}
#Override
public Fragment getItem(int i) {
return m_frag_A; //only 1 item for now
}
#Override
public int getCount() {
return 1;
}
#Override
public CharSequence getPageTitle(int i) {
return "Title Frag A"; //only 1 item for now
}
}
MY FRAGMENT (THERE IS ONLY ONE FOR NOW):
package com.KhalidSorensen.animalsounds;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridView;
public class MyFragment extends Fragment {
private GridView m_gridView;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
Log.i("Khalid","FragAnimalSounds: onCreateView");
View view = inflater.inflate(R.layout.activity_animal_sounds, container, false);
m_gridView = (GridView) view.findViewById(R.id.lbl_gridView);
m_gridView.setAdapter(new VivzAdapter(view.getContext()));
MainActivity.SetColumnWidth(m_gridView);
return view;
}
public GridView getM_gridView() {
return m_gridView;
}
}
MY GRIDVIEW ADAPTER:
package com.KhalidSorensen.animalsounds;
import java.util.ArrayList;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
public class VivzAdapter extends BaseAdapter {
private Context m_context;
private ArrayList<AnimalKind> m_list = new ArrayList<AnimalKind>();
VivzAdapter(Context ctx) {
m_context = ctx;
int[] animalphotos = { R.drawable.cat_1, R.drawable.cow_1,
R.drawable.dog_1, R.drawable.donkey_1, R.drawable.duck_1,
R.drawable.peacock_1, R.drawable.rooster_1, R.drawable.seal_1 };
for (int i = 0; i <= 7; i++) {
AnimalKind animalKind = new AnimalKind(m_context, animalphotos[i]);
m_list.add(animalKind);
}
}
#Override
public int getCount() {
return m_list.size();
}
#Override
public AnimalKind getItem(int position) {
return m_list.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int i, View v, ViewGroup vg) {
return m_list.get(i);
}
}
MY CUSTOM OBJECT CLASS. THESE OBJECTS ARE POPULATING THE GRIDVIEW:
package com.KhalidSorensen.animalsounds;
import android.content.Context;
import android.graphics.Color;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
public class AnimalKind extends ImageView implements OnClickListener{
private int m_imageId;
public AnimalKind(Context ctx, int imageId) {
super(ctx);
m_imageId = imageId;
super.setImageResource(imageId);
super.setAdjustViewBounds(true);
super.setScaleType(ImageView.ScaleType.FIT_XY);
super.setPadding(1, 1, 1, 1);
super.setBackgroundColor(Color.BLACK);
super.setOnClickListener(this);
}
//#Override
public void onClick(View v) {
//Do Something
}
#Override
public void setPressed(boolean pressed) {
//Do Something
}
public int getM_imageId() {
return m_imageId;
}
}
MY PREFERENCE ACTIVITY:
package com.KhalidSorensen.animalsounds;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.util.Log;
public class Preferences extends PreferenceActivity {
#SuppressWarnings("deprecation")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
Log.i("Khalid", "Preferences: onCreate");
}
}
MY XML FOR MY MAIN ACTIVITY:
<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.PagerTitleStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/lbl_title"
android:background="#33B5E5"
android:layout_gravity="top"
android:paddingTop="0dp"
android:paddingBottom="0dp"> "
</android.support.v4.view.PagerTitleStrip>
</android.support.v4.view.ViewPager>
AND FINALLY, MY XML FOR THE GRIDVIEW:
<?xml version="1.0" encoding="utf-8"?>
<GridView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/lbl_gridView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal"
android:layout_margin="0px"
android:alwaysDrawnWithCache="false"
android:animateLayoutChanges="false"
android:background="#android:color/white"
android:columnWidth="130dp"
android:drawSelectorOnTop="true"
android:horizontalSpacing="#dimen/activity_horizontal_margin"
android:listSelector="#null"
android:numColumns="auto_fit"
android:padding="#dimen/activity_horizontal_margin"
android:scrollbarStyle="insideOverlay"
android:smoothScrollbar="true"
android:stretchMode="none"
android:verticalSpacing="#dimen/activity_vertical_margin" >
</GridView>
Use CENTER_INSIDE a scale type for your image view.
super.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
another thing that I would change is the way you handle the column width. I would remove the android:numColumns="auto_fit". On the other hand you know that the number of columns is the cealing of WidthViewGrid/desiderePicSize, where the most common case for WidthViewGrid is the screen's width. On then programmatically you can set number of columns of your GridView with setNumberOfColumns
I would say:
A. After calling setColumnWidth call the gridview.invalidate()
B. After returning from the change preference - call adapter's notifyDataSetChanged in order to make sure it re-creates the views in the adapter (i.e. getView will be called)
I am creating an app in android.
In this app i want to show google Map after click on button.
I have declared button and i declared listener.
But my problem is i want to call another activity class in the action listener and show google map.
But it is not working, I changed emulator from google to Android it work but google API is not called and shows me error.
for this i used this code But my Map is not show and my Application is Terminated .
//----------------Main Activity ---------------//
import java.security.PublicKey;
import com.google.android.maps.MapView;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.os.Build;
public class MainActivity extends ActionBarActivity {
EditText TextFeild;
Button button1;
Context context=this;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addOnListenerAction();
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
public void addOnListenerAction()
{
TextFeild=(EditText) findViewById(R.id.editText1);
button1=(Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
Intent intent=new Intent(context,MapViwer.class);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}
//_-------------------MapViwer Class------------//
import android.os.Bundle;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
public class MapViwer extends MapActivity
{
MapView map;
public void onCreate(Bundle setInstanceState)
{
super.onCreate(setInstanceState);
setContentView(R.layout.activity_main);
map=(MapView) findViewById(R.id.mapView);
}
#Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}
So you're saying, you have a class named (MapViwer) that defines a layout and the class (MapViwer) contains information for the map to work. To deploy a class from your MainActivity.class, use the following method.
in MainActivity, under the public class add this
private Button button1;
then add this function -
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
Intent i = new Intent(getApplicationContext(), MapViwer.class);
startActivityForResult(i, 100);
}
});
Use it like this..It worked for me..
Button b=(Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent=new Intent(MainActivity.this,MapViewer.class);
startActivity(intent);
}
});
and in the Mapviewer class just call the mapviewer.xml
Now, the mapviewer.xml should look like this
<?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" >
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_marginBottom="34dp" />
</LinearLayout>
Try it out..
Replace context with Mainactivity.this in the code
Intent intent=new Intent(context,MapViwer.class);
You just only defined intent but didn't call the Mapviewr activity
Correct code:
public void addOnListenerAction()
{
TextFeild=(EditText) findViewById(R.id.editText1);
button1=(Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
Intent intent=new Intent(Mainactivity.this,MapViwer.class);
startActivity(intent);
}
});
}
I have added a toggleButton, but it is not showing up and I cannot figure out why. I have completed the Android tutorial, and have looked back at the code, as well as many other sources. The objective is to have the program pause when the button is ON. At the moment, the button will not even show up on the user interface. Any suggestions?
<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"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" />
<ToggleButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:onClick="pauseCounter" />
</RelativeLayout>
package com.evorlor.counter;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent counter = new Intent(MainActivity.this, Counter.class);
startActivity(counter);
}
public void pauseCounter(View view) {
Intent pause = new Intent(this, Pause.class);
startActivity(pause);
}
// #Override
// public boolean onCreateOptionsMenu(Menu menu) {
// // Inflate the menu; this adds items to the action bar if it is present.
// getMenuInflater().inflate(R.menu.activity_main, menu);
// return true;
// }
}
package com.evorlor.counter;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class Pause extends Activity{
public void onCreate(Bundle instPause) {
super.onCreate(instPause);
TextView tv = new TextView(this);
tv.setTextSize(250);
tv.setText("PAUSE");
setContentView(tv);
}
}
Here is my Counter class. It is messy. Sorry. This is as close as I have come so far. Help would be very appreciated! I have spent a lot of time on this measly button! Thanks!
package com.evorlor.counter;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MotionEvent;
import android.widget.TextView;
import android.widget.ToggleButton;
public class Counter extends Activity {
private int count = 0;
private int hiCount = 0;
private boolean capCount = false;
public void onCreate(Bundle instCounter) {
super.onCreate(instCounter);
TextView tv = new TextView(this);
tv.setTextSize(250);
if (count < 10000 && capCount == false) {
tv.setText(Integer.toString(count));
} else {
capCount = true;
if (count >= 10000) {
hiCount += 10;
count -= 10000;
}
if (hiCount < 100) {
tv.setText(hiCount + "k+" + count);
} else {
tv.setText("Over\n100k");
}
}
tv.setGravity(Gravity.CENTER);
setContentView(tv);
ToggleButton butPause = new ToggleButton(this);
if (butPause == null) {
Intent pause = new Intent(this, Pause.class);
startActivity(pause);
}
}
// public void pauseCounter(View view) {
// Intent pause = new Intent(this, Pause.class);
// startActivity(pause);
// }
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent counter = new Intent(MainActivity.this, Counter.class);
startActivity(counter);
}
You are starting a new activity right away. thats not a good idea.
You are going to see what is in your Counter activity, not what is in your main activity, reason you don't see your toggle button. Comment out startActivity() just to check.