Compressing converting a bitmap to PNG format Android example
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static Bitmap codec(Bitmap src, Bitmap.CompressFormat format,
int quality) {
ByteArrayOutputStream os = new ByteArrayOutputStream();
src.compress(format, quality, os);
byte[] array = os.toByteArray();
return BitmapFactory.decodeByteArray(array, 0, array.length);
}
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 bmp = BitmapFactory.decodeResource(getResources(), R.drawable.flower_blue);
Bitmap bPNGcompress = codec(bmp, Bitmap.CompressFormat.PNG, 0);
int h = bmp.getHeight();
canvas.drawBitmap(bmp, 10,10, paint);
canvas.drawBitmap(bPNGcompress, 10,10 + h + 10, paint);
}
}
}
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When Eclipse and the emulator runs.
To access the DDMS perspective, go to Window > Open Perspective > DDMS. If DDMS does not appear, go to Window > Open Perspective > Other ... and select DDMS.
Open Devices TAB. Window -> Show view -> Devices
From Devices TAB select Screen Capture
To access the DDMS perspective, go to Window > Open Perspective > DDMS. If DDMS does not appear, go to Window > Open Perspective > Other ... and select DDMS.
Open Devices TAB. Window -> Show view -> Devices
From Devices TAB select Screen Capture
ImputStream is = this.getResources().openRawResource(R.drawable.colors);
Bitmap mBitmap2 = BitmapFactory.decodeStream(is);
int w = mBitmap2.getWidth();
int h = mBitmap2.getHeight();
// int x , y have to be smaller as w , h
int _color = mBitmap2.getPixel(x, y);
Admob testing on emulator issue.
Android Eclipse code warning:
setTesting(boolean) from the type AdRequest is deprecated
Solution:
adRequest.addTestDevice(AdRequest.TEST_EMULATOR);
Android Eclipse code warning:
setTesting(boolean) from the type AdRequest is deprecated
Solution:
adRequest.addTestDevice(AdRequest.TEST_EMULATOR);
AdView adView = new AdView(this, AdSize.BANNER, "a14d9..........");//MY_AD_UNIT_ID
AdRequest adRequest = new AdRequest();
adRequest.setTesting(true); // deprecated
adRequest.addTestDevice(AdRequest.TEST_EMULATOR); // OK
adView.loadAd(adRequest);
Where file(s) does eclipse store Java code style settings to?
If you need copy any old templates to the new workspace.
You can edit the Eclipse Templates from menu Window - Preferences - Java - Editor - Templates.
If you need copy any old templates to the new workspace.
workspace\.metadata\.plugins\org.eclipse.core.runtime\.settings\org.eclipse.jdt.ui.prefs
You can edit the Eclipse Templates from menu Window - Preferences - Java - Editor - Templates.
RelativeLayout like parent, child Srollview is centered horizontal.
Second RelativeLayout in SrollView have gravity center, every child will centered horizontally and vertically.
Second RelativeLayout in SrollView have gravity center, every child will centered horizontally and vertically.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="//schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:gravity="center_horizontal">
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/scrollView2" >
<RelativeLayout
android:layout_width="320dp"
android:layout_height="wrap_content"
android:background="#e6f825"
android:gravity="center">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button" />
</RelativeLayout>
</ScrollView>
</RelativeLayout>
Editace: 2013-12-09 13:09:31
Počet článků v kategorii: 397
Url:compressing-converting-a-bitmap-to-png-format-android-example
