Android runtime change switch Activity theme
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static boolean mbThemeLight = false;
@Override
public void onCreate(Bundle savedInstanceState) {
if(mbThemeLight)
setTheme(android.R.style.Theme_Light);
super.onCreate(savedInstanceState);
// bla bla bla..........
}
private void switchTheme(){
mbThemeLight = true;
this.recreate();
}
397LW NO topic_id
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Další témata ....(Topics)
Unable to resolve target android-7
Try this solution:
Select project from tree (project explorer)
- right click on project
- properties
- select Android from tree
- change Project Build Target to higher (or change project build target)
- selct from menu: Project-Clean ( select your project - OK)
Try this solution:
Select project from tree (project explorer)
- right click on project
- properties
- select Android from tree
- change Project Build Target to higher (or change project build target)
- selct from menu: Project-Clean ( select your project - OK)
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
TextView textView = new TextView(this);
textView.setText("Text View ");
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
layout.addView(textView, p);
Button buttonView = new Button(this);
buttonView.setText("Button");
buttonView.setOnClickListener(mThisButtonListener);
layout.addView(buttonView, p);
}
private OnClickListener mThisButtonListener = new OnClickListener() {
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Hello !",
Toast.LENGTH_LONG).show();
}
};
}
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
// CONSTRUCTOR
public SampleView(Context context) {
super(context);
setFocusable(true);
}
@Override
protected void onDraw(Canvas canvas) {
Paint paint = new Paint();
canvas.drawColor(Color.YELLOW);
Bitmap b = Bitmap.createBitmap(200, 200,
Bitmap.Config.ARGB_8888);
// you need to insert a image flower_blue into res/drawable folder
paint.setFilterBitmap(true);
Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),
R.drawable.flower_blue);
canvas.drawBitmap(bitmapOrg, 10, 10, paint);
int width, height;
Canvas c = new Canvas(b);
paint.setAlpha(255); //0x80
c.translate(0, 30);
c.drawBitmap(bitmapOrg, new Matrix(), paint);
paint.setColor(Color.BLUE);
Path mPath = new Path();
mPath.addCircle(50, 50, 50, Path.Direction.CCW);
//c.clipPath(mPath, Region.Op.UNION);
//c.clipPath(mPath, Region.Op.DIFFERENCE);
c.clipPath(mPath, Region.Op.INTERSECT);
//c.clipPath(mPath, Region.Op.REPLACE);
//c.clipPath(mPath, Region.Op.XOR);
paint.setColor(Color.GREEN);
paint.setAntiAlias(true);
c.drawCircle(30, 20, 30, paint);
int h = bitmapOrg.getHeight();
//canvas.drawBitmap(bitmapOrg, 10, 10, paint);
canvas.drawBitmap(b, 0, 10 + h + 10, paint);
}
}
}


Toast in Android application is equivalent of Alert in JavaScript or MessageBox in WinApi.
// Toast android.widget.Toast.makeText(Context context, CharSequence text, int duration)
// public static Toast makeText (Context context, CharSequence text, int duration)
Toast.makeText(getApplicationContext(), "Hello world!",
Toast.LENGTH_SHORT).show();
No resource found that matches the given name - error examples.
Exist resource file?
Is code written correctly?
Exist resource file?
Is code written correctly?
// No resource found that matches the given name (at id with value @id/myButton).
android:id="@id/myButton" // invalid id notation
android:id="@+id/myButton" // correct
// No resource found that matches the given name
// (at icon with value @drawable/icons).
// exist file icons in res/drawable folder?
<application android:icon="@drawable/icons"
//No resource found that matches the given name
//(at theme with value @style/MyThem).
<activity android:name=".Main"
android:label="@string/app_name"
android:theme="@style/MyThem">
// Exist style MyThem in styles.xml ? No only MyTheme
<style name="MyTheme" parent="android:Theme">
<item name="android:windowTitleSize">50px</item>
</style>
// exist file my_background in folder drawable ?
android:background="@drawable/my_background" //
// no resource found that matches the given name(at "label" with value "@string/app_name")
// have you the string resource defined in res/values/strings.xml ?
<string name="app_name">"My App"</string>
Editace: 2017-04-22 10:52:43
Počet článků v kategorii: 397
Url:android-runtime-change-switch-activity-theme
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