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Rename Android project package issue in Eclipse - R cannot be resolved to a variable


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Issue: After after renaming package this problem occurred "R cannot be resolved to a variable".

Solution: Try Clean your project Project » Clean » Clean projects selected below » select your project and click OK.

Try to delete the invalid code and type it again:

LinearLayout layout = (LinearLayout) findViewById(R.id.layout); // delete R.id.layout
LinearLayout layout = (LinearLayout) findViewById(); 
LinearLayout layout = (LinearLayout) findViewById(R.id.layout); // re-write this code R.id.layout

397LW NO topic_id




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Další témata ....(Topics)


170

webcoreglue(): The real object has been deleted Emulator Error | webcoreglue-the-real-object-has-been-deleted-emulator-error


Error for example:
webcoreglue(2075): The real object has been deleted

Solution:
If this error message shows if orientation the screen is changed
try insert into AndroidManifest.xml this code:
android:configChanges="keyboard|keyboardHidden|orientation"

      <activity
            android:label="@string/app_name"
            android:name=".MyActivity" 
            android:screenOrientation="portrait"
            android:configChanges="keyboard|keyboardHidden|orientation"
            >

130

Bitmap get Bitmap from resource Android example | bitmap-get-bitmap-from-resource-android-example


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);

362

Android Studio gradle file comment same as java comment | android-studio-gradle-file-comment-same-as-java-comment



// single line
/*
multi line
*/
143

Rounded rect RectF Android example | rounded-rect-rectf-android-example


RectF, drawRoundRect(),

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.GREEN);
            
           Bitmap b = Bitmap.createBitmap(200, 200, Bitmap.Config.ALPHA_8);
           Canvas c = new Canvas(b);
           RectF rectF = new RectF();
           rectF.set(5,5,150,150);
           c.drawRoundRect(rectF, 10, 10, paint);
           
            paint.setColor(Color.RED);
           
           canvas.drawBitmap(b, 10,10, paint);
		}

	}
}


draw-rounded-rect-android
301

sqlite database get path Android | sqlite-database-get-path-android



Context context = getApplicationContext();
String DB_PATH = "/data/data/"
                + context.getPackageName()
                + "/databases/";


Editace: 2014-02-15 20:45:39
Počet článků v kategorii: 397
Url:rename-android-project-package-issue-in-eclipse

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