tag should specify a target API level Warning

Hmotnost 160 g
Procesor 1.4 GHz Qualcomm Scorpion
Displej 800 x 480, 4.3 in. ClearBlack AMOLED capacitive touchscreen, 16m-color WVGA, Corning® Gorilla® Glass (odolný povrch)
Velikost displeje v palcích 4,3
Rozměry 128 x 68 x 11,5
Fotoaparát 8 Mpix, 3264x2448 pixelů, dual-LED flash, autofocus Carl Zeiss optika, 720p video capture
HD video, natačení videosekvencí, editace fotografií, přední kamera
Operační system Windows Phone 7
Datové funkce GPS modul, WiFi, Bluetooth, NFC, GPRS, EDGE, HSCSD
Přední kamera 1 Megapixel, 1280x720 pixelů
Připojení Bluetooth 2.1, 802.11b/g/n, dual mode A-GPS/GLONASS, micro-USB, 3.5mm audio jack, FM radio


Výhody svižný operační systém, editace MS Office dokumentů, napojení na cloudové uložiště SkyDrive (25GB prostoru zdarma), integrace sociálních sítí

Nevýhody v porovnání s Androidem méně aplikaci ke stažení zdarma

build.gradle in module have higher priority then AndrodiManifest.xml
Try this.
AndroidManifest.xml have code:

    <uses-sdk
        android:minSdkVersion="9"
        android:targetSdkVersion="23" />

build.gradle have code:

   defaultConfig {
        applicationId "cz.okhelp.words"
        minSdkVersion 9
        targetSdkVersion 19
        versionCode 107
        versionName "1.0.7"
    }

Warning in AndroidManifest.xml:
This targetSdkVersion value (23) is not used; it is always overridden by the value specified in the Gradle build script (19) less... (Ctrl+F1)
The value of (for example) minSdkVersion is only used if it is not specified in the build.gradle build scripts. When specified in the Gradle build scripts, the manifest value is ignored and can be misleading, so should be removed to avoid ambiguity.

Set, get string , array of array of strings, Java example code

	public final static String[][]_arArOfString_1 = {
		new String[] {"bla","bla","hello world!"},
		new String[] {},
		new String[] {},
		new String[] {},
		new String[] {},
		new String[] {}
	};
String sOut = _arArOfString_1[0][2]; // hello world!

drawPath, canvas.rotate, lineTo basic Android example for your testing.

// //www.apache.org/licenses/LICENSE-2.0
// The Android Open Source Project
public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {
		private Paint mPaint = new Paint();
		private Path mPath = new Path();

		// CONSTRUCTOR
		public SampleView(Context context) {
			super(context);
			setFocusable(true);

			// Construct a wedge-shaped path
			mPath.moveTo(0, -60);
			mPath.lineTo(-20, 80);
			mPath.lineTo(0, 60);
			mPath.lineTo(20, 80);
			mPath.close();
		}

		@Override
		protected void onDraw(Canvas canvas) {
			Paint paint = mPaint;

			canvas.drawColor(Color.WHITE);

			paint.setAntiAlias(true);
			paint.setColor(Color.RED);
			paint.setStyle(Paint.Style.FILL);
			Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),
					R.drawable.flower_blue);
			canvas.drawBitmap(bitmapOrg, 10, 10, paint);
			int w = canvas.getWidth();
			int h = canvas.getHeight();
			int cx = w / 2;
			int cy = h / 2;

			canvas.translate(cx, cy);
         // uncomment next line 
			//canvas.rotate(90.0f);
			canvas.drawPath(mPath, mPaint);
		}

	}
}

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);
		}

	}
}