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Unable to resolve target android


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Unable to resolve target android-7
Try this solution:
Select project from tree (project explorer)
- right click on project
- properties
- select Android from tree
- change Project Build Target to higher (or change project build target)
- selct from menu: Project-Clean ( select your project - OK)

397LW NO topic_id




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Další témata ....(Topics)


188

Error android.widget.LinearLayout.measureHorizontal LinearLayout.java | error-android-widget-linearlayout-measurehorizontal-linearlayout-java


Code with error:

ImageView imgV = (ImageView)findViewById(R.id.myView);
        imgV.setLayoutParams(new ViewGroup.LayoutParams(
        		ViewGroup.LayoutParams.WRAP_CONTENT,
        		0));


If you get error try this code:

        ViewGroup.LayoutParams layoutParams = imgV
				.getLayoutParams();
		layoutParams.height = 0;
		imgV.setLayoutParams(layoutParams);




java.lang.ClassCastException: android.view.ViewGroup$LayoutParams
at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:659)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:311)
at android.view.View.measure(View.java:8313)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:386)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
at android.view.View.measure(View.java:8313)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
at android.view.View.measure(View.java:8313)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
at android.view.View.measure(View.java:8313)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
at android.view.View.measure(View.java:8313)
322

View overrides onTouchEvent but not performClick | view-overrides-ontouchevent-but-not-performclick



public class Panel extends SurfaceView implements SurfaceHolder.Callback {
//............... code
//............... some code
   /**
     * Process the MotionEvent.
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
    	
        synchronized (getHolder()) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
            	performClick();
             } else if (event.getAction() == MotionEvent.ACTION_MOVE) {
            	if(_currentGraphic==null)return true;
                
            } else if (event.getAction() == MotionEvent.ACTION_UP) {
            }
            return true;
        }
    }
/////////////////////////////
 @Override
 public boolean performClick() {
  // Calls the super implementation, which generates an AccessibilityEvent
        // and calls the onClick() listener on the view, if any
        super.performClick();

        // Handle the action for the custom click here

        return true;
 }

}

365

layout-sw600dp values-sw600dp Android example of use | layout-sw600dp-values-sw600dp-android-example-of-use


Why the app selects data from basic layout folder if smallest width is higher then the number in folder name?
Example 1
layout-sw600dp values-sw600dp (smallest width sw for data usage from this folder is 600dp density independent pixel!!!!!)
Device screen resolution is 1200 x 900 px (pixel) Wow, app to be select data from sw600dp folder! Realy?
DPI of device screen - dot per inch (pixel per inch) is 480 pixel it is wery important number!


  1. App selects smallest dimension of screen. In our case 900 px
    Medium screen have 160 dpi (The density-independent pixel is equivalent to one physical pixel on a 160 dpi screen, which is the baseline density assumed by the system for a "medium" density screen.).


  2. App calculate ratio 480 / 160 = 3 (The conversion of dp units to screen pixels: px = dp * (dpi / 160))


  3. App calculate smallest dimesnion of screen in dp 900 / 3 = 300 dip or dp (density independed pixel).


  4. App selects data from basic values and layout folder because sw600dp is greater than 300dp.





In our case smallest dimension of screen must be at least 1800 real - physical pixels (1800 px / 3 ratio(dpi/160) = 600 dp (dip density independend pixels) to be used data from folders values-sw600dp and layout-sw600dp.


Example 2 see Example 1 abouve
Device: Nexus 7 (2012) selected from Android Studio tool layout editor
Resolution: 800x1280 px
DPI: tvdpi (approximately 213dpi)
Ratio: 1.33 (213 / 160)
Smallest width in px: 800
Convert px to dp: 601.5 (800 / 1.33)
Result:Smallest width is 601.5dp The App to be used data from folders values-sw600dp and layout-sw600dp.
35

Android startup tutorial for developers video | android-startup-tutorial-for-developers-video


297

Shared Preferences file path Android | shared-preferences-file-path-android



/data/data/<package>/shared_prefs/<package>_preferences.xml

String TAG = "MyActivityName";
File f = new File("/data/data/"+this.getPackageName()
+"/shared_prefs/"+this.getPackageName()+"_preferences.xml");
if(f.exists())
	Log.d(TAG, "exist");
else
	Log.d(TAG, "not exist");



Editace: 2013-12-09 10:06:50
Počet článků v kategorii: 397
Url:unable-to-resolve-target-android

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