Okhelp.cz

Recepty, články, nápady, programování. Dříve dum-zahrada, finance, internet a know-how.okhelp.cz Pro lepší výsledky hledání používejte i diakritiku.

The application may be doing too much work on its main thread


AD MOB

Warning: The application may be doing too much work on its main thread
Try this sorce code:

import android.os.StrictMode;

public class MyActivity extends Activity {
	static{
		StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
		StrictMode.setThreadPolicy(policy);
	}
	@Override
    public void onCreate(Bundle savedInstanceState) {
//.................. etc.


397LW NO topic_id




AD

Další témata ....(Topics)


146

Rotate a image bitmap picture Android example | rotate-a-image-bitmap-android-example


Rotate a bitmap Android source code.

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 
			Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.flower_blue);
			 Matrix mat = new Matrix();
			                mat.postRotate(90);
			                Bitmap bmpRotate = Bitmap.createBitmap(bmp, 0, 0,
			  bmp.getWidth(), bmp.getHeight(),
			  mat, true);
		   int h = bmp.getHeight();
           
           canvas.drawBitmap(bmp, 10,10, paint);
           canvas.drawBitmap(bmpRotate, 10,10 + h + 10, paint);
           
		}

	}
}




rotate bitmap android
67

File open read to StringBuilder close Java example | file-open-read-to-stringbuilder-close-java-example


BufferedReader , FileReader, StringBuilder , readLine, close Java example

Android example

String MYFILE = "my_file";
FileInputStream fis = openFileInput(MYFILE);
	int c; String sText = "";
	while((c=fis.read())!=-1)
	{

		sText += (char)c; // convert int to char
	 }
	fis.close();						



Java example

try {
	    BufferedReader in = new BufferedReader(new FileReader("myfile.txt"));
	    StringBuilder strBuilder = new StringBuilder();
	    String str;
	    while ((str = in.readLine()) != null) {
	       strBuilder.append(str);
	    }
	    in.close();
	} catch (IOException e) {
		e.toString();
	}

94

Is NaN isNaN isInfinite number value Java Android example | is-nan-isnan-java-example


float, double is NaN isNaN() isInfinite() Java Android example.

float f = 0.f;
boolean bIsNaN = Float.isNaN(f);
boolean bIsInfinite = Float.isInfinite(f);

 double d = Math.sqrt(-10);
 boolean b = Double.isNaN(d);

396

ADB restart device every time Android Studio | adb-restart-device-every-time


Android Studio ADB restart mobile device from USB every time if RUN of DEBUG button pressed

Try to close the mobile application on your device completely before starting again from Android Studio.
Close every fragment.
The problem occurs when the application has multiple fragments.

Date: 13.07.2020 - 08:23
345

Pixel to density independent pixel to pixel conversion | pixel-to-density-independent-pixel-to-pixel-conversion


Physical pixel (px)
Density independent pixel (dp)
Dots per inch (dpi) .. physical pixels per inch
px = dp * (dpi / 160)

public static int dpToPx(int dp)
{
    return (int) (dp * Resources.getSystem().getDisplayMetrics().density);
}

public static int pxToDp(int px)
{
    return (int) (px / Resources.getSystem().getDisplayMetrics().density);
}


Editace: 2013-12-09 10:11:46
Počet článků v kategorii: 397
Url:the-application-may-be-doing-too-much-work-on-its-main-thread

AD
11 Share
Share
Tweet