Delete Bitmap Android Example
If some memory leak - problem try release of memory used of a big Bitmap what already not to need;
//developer.android.com/reference/android/graphics/Bitmap.html
Free the native object associated with this bitmap, and clear the reference to the pixel data. This will not free the pixel data synchronously; it simply allows it to be garbage collected if there are no other references. The bitmap is marked as "dead”, meaning it will throw an exception if getPixels() or setPixels() is called, and will draw nothing. This operation cannot be reversed, so it should only be called if you are sure there are no further uses for the bitmap. This is an advanced call, and normally need not be called, since the normal GC process will free up this memory when there are no more references to this bitmap.
Bitmpap bmp; // not null
bmp.recycle();
bmp = null;
final boolean bmpIsRecycled = bmp.isRecycled()
// Returns true if this bitmap has been recycled.
//developer.android.com/reference/android/graphics/Bitmap.html
Free the native object associated with this bitmap, and clear the reference to the pixel data. This will not free the pixel data synchronously; it simply allows it to be garbage collected if there are no other references. The bitmap is marked as "dead”, meaning it will throw an exception if getPixels() or setPixels() is called, and will draw nothing. This operation cannot be reversed, so it should only be called if you are sure there are no further uses for the bitmap. This is an advanced call, and normally need not be called, since the normal GC process will free up this memory when there are no more references to this bitmap.
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Converting to string: TypedValue{t=0x10/d=0xe a=-1}
- 14
// error
- "18"
// ok
Calendar cal = new GregorianCalendar(), int year = cal.get(Calendar.YEAR),
ERA, MONTH, DAY_OF_MONTH, DAY_OF_WEEK, Android example code.
ERA, MONTH, DAY_OF_MONTH, DAY_OF_WEEK, Android example code.
public class MainActivity extends Activity {
TextView txtV;
Context cntx;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
txtV = (TextView)findViewById(R.id.idLabel);
cntx = this;
Calendar cal = new GregorianCalendar();
int era = cal.get(Calendar.ERA); // 0 B.C. before Christ, 1 Anno Domini
txtV.setText(txtV.getText() +"
" + era);
int year = cal.get(Calendar.YEAR); // 2011
txtV.setText(txtV.getText() +"
" + year);
int month = cal.get(Calendar.MONTH); // 0 is Januar
txtV.setText(txtV.getText() +"
" + month);
int day = cal.get(Calendar.DAY_OF_MONTH); // 1 to 31
txtV.setText(txtV.getText() +"
" + day);
int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK); // 1=Sunday, 2=Monday ...
txtV.setText(txtV.getText() +"
" + dayOfWeek);
}
}
Tutorial by pictures how evaluate a variable in Eclipse debugger window.
1.) Open Debug perspective in Eclipse and to start debugging a Activity.
2.) Open Display window from menu Window->Show view->Display
3.) Set breakpoint where you need to evaluate a variable.
4.) Debug the Activity to breakpoint.
5.) Into the Display window type code for evaluate your variable and execute code.
6.) Check if change of value a variable
1.) Open Debug perspective in Eclipse and to start debugging a Activity.
2.) Open Display window from menu Window->Show view->Display
3.) Set breakpoint where you need to evaluate a variable.
4.) Debug the Activity to breakpoint.
5.) Into the Display window type code for evaluate your variable and execute code.
6.) Check if change of value a variable
// on bottom of onCreate add listener
mInterstitialAd .setAdListener(new AdListener(){
public void onAdLoaded(){
interstitial.show();
}
});
} // end onCreate
public void displayInterstitial (){
if (mInterstitialAd.isLoaded()) {
mInterstitialAd.show();
}
}
If on Android emulator home button pressed.
Diagram of Activity lifecycle if button HOME pressed
// button home presssed
19:37:06.727: INFO/ActivityManager(60): Starting:
Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME]
flg=0x10200000 cmp=com.android.launcher/com.android.launcher2.Launcher } from pid 60
19:37:06.807: INFO/onSaveInstanceState(339): onSaveInstanceState()
19:37:06.848: INFO/onPause(339): onPause()
19:37:07.968: INFO/onStop(339): onStop()
Diagram of Activity lifecycle if button HOME pressed
Editace: 2013-12-09 12:59:36
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Url:delete-bitmap-android-example
