Bitmap get Bitmap from resource Android example
AD MOB
PNG, GIF, BMP, JPG
// //www.apache.org/licenses/LICENSE-2.0
// 1.) Bitmap from stream
InputStream is = context.getResources().openRawResource(R.drawable.my_image);
mBitmap = BitmapFactory.decodeStream(is);
// 2.)
Bitmap ball = BitmapFactory.decodeResource(getResources(), R.drawable.ball);
int dstWidth =120;
int dstHeight = 120;
mBitmap = Bitmap.createScaledBitmap(ball, dstWidth, dstHeight, true);
// 3.)
Bitmap mBitmap = Bitmap.createBitmap(320, 480, Bitmap.Config.ARGB_8888);
Bitmap mBitmap;
Canvas mCanvas;
Paint mBitmapPaint;
mBitmap = Bitmap.createBitmap(320, 480, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
// 4.)
Bitmap mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.RGB_565);
Canvas mCanvas.setBitmap(mBitmap);
mCanvas.drawColor(0xFFFFFFFF);
397LW NO topic_id
AD
Další témata ....(Topics)
If you do click on Rebuid project menu item, this operation maybe consume long time on slovly PC.
Some errors dismis when you do rebuild project, or module.
Try this:
Select module where contains red error code and press Debugg or Run button on Android Studio.
If module code contains errors, Android Studio show error report in gradle console.
If not, apk will installed on device.
This is 10 times faster than Clean - Rebuild all project.
Some errors dismis when you do rebuild project, or module.
Try this:
Select module where contains red error code and press Debugg or Run button on Android Studio.
If module code contains errors, Android Studio show error report in gradle console.
If not, apk will installed on device.
This is 10 times faster than Clean - Rebuild all project.
drawText(), setColor(), setTextSize(), setTextAlign()
public class ApokusActivity 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();
paint.setColor(Color.YELLOW);
paint.setTextSize(60);
//paint.setTextAlign(Paint.Align.CENTER);
canvas.drawText("Hello world!", 0, 50, paint);
}
}
}
private SensorManager mSensorManager;
private PowerManager mPowerManager;
private WindowManager mWindowManager;
private Display mDisplay;
// onCreate
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get an instance of the SensorManager
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
// Get an instance of the PowerManager
mPowerManager = (PowerManager) getSystemService(POWER_SERVICE);
// Get an instance of the WindowManager
mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
mDisplay = mWindowManager.getDefaultDisplay();
setContentView(R.layout.main); // main.xml or your xml file name
}
// Context instead Activity as a parameter
@Override
public void onAttach(Context context) {
super.onAttach(context);
Activity a;
if (context instanceof Activity){
a=(Activity) context;
}
}
OnNoteClickedListener listener;
/* old emxample of usage
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
listener = (OnNoteClickedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnNoteClickedListener");
}
}
*/
// new version of code
@Override
public void onAttach(Context context) {
super.onAttach(context);
Activity a;
if (context instanceof Activity){
a=(Activity) context;
try {
listener = (OnNoteClickedListener) a;
} catch (ClassCastException e) {
throw new ClassCastException(a.toString()
+ " must implement OnNoteClickedListener");
}
}
}
The exact physical pixels per inch of the screen
Get size of pixel
Get DPI
Get count of pixels per inch
Get size of pixel
Get DPI
Get count of pixels per inch
float mXDpi;
float mYDpi;
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
mXDpi = metrics.xdpi; // The exact physical pixels per inch of the screen in the X dimension.
mYDpi = metrics.ydpi;
float mMetersToPixelsX = mXDpi / 0.0254f; // 1 inch == 0.0254 metre
float mMetersToPixelsY = mYDpi / 0.0254f;
Editace: 2013-12-09 13:12:32
Počet článků v kategorii: 397
Url:bitmap-get-bitmap-from-resource-android-example
AD
