Resource Entry already defined

String s = "Some text for appending

";
 TextView   mTitle = (TextView) findViewById(R.id.title_text);
 mTitle.setText(R.string.app_name); // insert text from strings.xml
 mTitle.append(s); // append string like a variable value
 mTitle.append("My string will appended

"); // append string

You can insert this source code into onCreate in your activity file

Špičkový smartphone od Samsungu.

Technické parametry Samsung i9300 Galaxy S III
Rozměry a hmotnost: 137 x 71 x 9 mm, 133 gramů
Datové funkce: GPS modul, WiFi, Bluetooth, NFC, GPRS, EDGE, HSCSD, Hardwarový modem, Infraport
Sítě: pásma GSM 850, 900, 1 800, 1 900 MHz pásma WCDMA (3G) 850, 900, 1 900, 2 100 MHz
Displej: HD Super AMOLED diplej o velikosti 1280x720 4,8 palců
Procesor: čtyřjádrový procesor 1.4 GHz
Uživatelská paměť: 16 MB
paměť RAM 1 024 MB
Operační systém: Android 4.0 ICS
Hudba: MP3
Video: HD rozlišení
Fotoaparát: 8 Mpix
Navigace:
Baterie: Li-Pol, pohotovostní doba 390 hodin
Cena: cca 14.500 korun / léto 2012

Samsung i9300 Galaxy S III obrázek

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)

Sensor, getSystemService(), getSensorList(), getDefaultDisplay(), WindowManager,
Surface.ROTATION_0, onAccuracyChanged() Android sample.

public class _MotionActivity extends Activity implements SensorEventListener {
    private float mSensorX;
    private float mSensorY;
    private Display mDisplay;
    private SensorManager sm;
    private PowerManager mPowerManager;
    private WindowManager mWindowManager;
   
    TextView textview;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Get an instance of the SensorManager
        sm = (SensorManager) getSystemService(SENSOR_SERVICE);
        if(sm.getSensorList(Sensor.TYPE_ACCELEROMETER).size()!=0){
        	Sensor s = sm.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0);
        	sm.registerListener(this,s, SensorManager.SENSOR_DELAY_NORMAL);
        }

        // 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);
        textview = (TextView)findViewById(R.id.textView1);
    }
    
    @Override
    public void onSensorChanged(SensorEvent event) {

    	
        if (event.sensor.getType() != Sensor.TYPE_ACCELEROMETER)
            return;

        switch (mDisplay.getRotation()) {
            case Surface.ROTATION_0:
                mSensorX = event.values[0];
                mSensorY = event.values[1];
                textview.setText(String.valueOf( mSensorX));
                break;
            case Surface.ROTATION_90:
                mSensorX = -event.values[1];
                mSensorY = event.values[0];
                textview.setText(String.valueOf( mSensorX));
                break;
            case Surface.ROTATION_180:
                mSensorX = -event.values[0];
                mSensorY = -event.values[1];
                textview.setText(String.valueOf( mSensorX));
                break;
            case Surface.ROTATION_270:
                mSensorX = event.values[1];
                mSensorY = -event.values[0];
                textview.setText(String.valueOf( mSensorX));
                break;
        }

    }

	@Override
	public void onAccuracyChanged(Sensor sensor, int accuracy) {
		// TODO Auto-generated method stub
		
	}
	@Override
	protected void onResume() {
		super.onResume();

             if(sm.getSensorList(Sensor.TYPE_ACCELEROMETER).size()!=0){
        	Sensor s = sm.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0);
        	sm.registerListener(this,s, SensorManager.SENSOR_DELAY_NORMAL);
             }
	}

	@Override
	protected void onPause() {
		
		sm.unregisterListener(this);
		super.onStop();
	}       
    
}

AdMob in Android emulator not visible?
You have to using some from this libraries:
GoogleAdMobAdsSdk-4.3.1.jar
GoogleAdMobAdsSdk-6.0.1.jar
GoogleAdMobAdsSdk-6.2.1.jar

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="//schemas.android.com/apk/res/android"
    package="cz.okhelp.admob"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="13"
        android:targetSdkVersion="16"/>

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    
   

    <application android:icon="@drawable/ic_launcher" android:label="@string/app_name">
       <meta-data 
        android:value="a14d932xxxxxxxx" 
        android:name="ADMOB_PUBLISHER_ID" />
        <activity android:name=".AdmobActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

<activity android:name="com.google.ads.AdActivity"
 android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
</application>
</manifest>

onCreate in your Activity.java

		@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
     			AdViw adView = new AdView(this, AdSize.BANNER, "a14d932xxxxxxxxx");//MY_AD_UNIT_ID
    			LinearLayout layout = (LinearLayout)findViewById(R.id.idReklamaLayout);
				// Add the adView to it
    			layout.addView(adView);
				// Initiate a generic request to load it with an ad
				AdRequest adRequest = new AdRequest();
    			//adRequest.setTesting(true);
    			adRequest.setGender(AdRequest.Gender.MALE);
    			adView.loadAd(adRequest);
    }

main.xml (res/layout)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
android:id="@+id/idReklamaLayout"
android:orientation="vertical"
android:gravity="center"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="3" />

</LinearLayout>