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Get Context Java Android example


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getContext() getApplicationContext() method Java Android example source






Context myContext_1 = ThisClassName.this; // to open a Dialog
Context myContext_2 = getContext();
Context myContext_3 = this.getContext();
Context myContext_4 = this;
Context myContext_5 = this.getApplicationContext ();


OnClickListener getImageBtnOnClick = new OnClickListener() {
public void onClick(View view) {
Context context = view.getContext();

}
};
// Toast
Toast.makeText(getApplicationContext(), "Context == getApplicationContext "
, Toast.LENGTH_SHORT).show();



// store Context in public class
public class MyActivity extends Activity {
public static Context myCnt = null;
...
protected void onCreate(Bundle icicle) {
...
myCnt = this;
MyStorage.setContext(myCnt);
// or
// MyStorage.setContext(this);

// cntxFromStorage == this
Context cntxFromStorage = MyStorage.getContext();
...
};
};

public class MyStorage
{
private static Context cntStorageContext = null;


public static Context getContext() {
return cntStorageContext;
}

public static void setContext(Context context) {
MyStorage.cntStorageContext = context;
}


};

class DataBaseHelper extends SQLiteOpenHelper {
// get MyActivity context
Context cnt = MyStorage.getContext();

}




396LW NO topic_id




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Další témata ....(Topics)


220

Delete Canvas - Fill Canvas Android example | delete-canvas-fill-canvas-android-example


Fill the entire canvas with the specified color.

@Override
    public void onDraw(Canvas canvas) {
    canvas.drawColor(Color.GREEN);
}
221

android - OnClickListener must override a superclass method | android-onclicklistener-must-override-a-superclass-method


The method onClick(DialogInterface, int) of type new DialogInterface.OnClickListener(){} must override a superclass method.

Try this:
Right click on project
Select Properties
In open dialogue select Java compiler
Set Enable project specific settings
Set Compiler compliance level to 1.6

android/project-properties-eclipse.png

android/java-compiler-settings-eclipse.png