Set Default Start Up Activity Class Java AndroidManifest xml

<manifest xmlns:android="//schemas.android.com/apk/res/android"
    package="com.myexample.without_titlebar">
    <application android:label="My app">
      <activity android:name="NoTitleBar"
        android:theme="@android:style/Theme.NoTitleBar"
        android:screenOrientation="portrait"
        android:configChanges="keyboardHidden|orientation">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

<searchable xmlns:android="//schemas.android.com/apk/res/android"
android:blahblah 
......
android:searchSuggestAuthority="com.yourdomen.yourproject.YourContentProviderClass"

 <provider android:name=".YourContentProviderClass"
                  android:authorities="com.yourdomen.yourproject.YourContentProviderClass" />

String sFileContent = readFile("myfile.txt",StandardCharsets.UTF_8);

	static String readFile(String path, Charset encoding) 
		  throws IOException 
		{
		  byte[] encoded = Files.readAllBytes(Paths.get(path));
		  return encoding.decode(ByteBuffer.wrap(encoded)).toString();
		}

// write file
String sOut = "text blah hello world etc.";
		writeToFile(sOut"someName.txt");	
	static void writeToFile(String sB,String name) {
		String folder = ("c:\\folder\");
		File f = new File(folder+ name);
		BufferedWriter writer = null;
			writer = new BufferedWriter( new OutputStreamWriter(
                           new FileOutputStream( folder+name),"UTF-8"));
			writer.write( sB);

				if ( writer != null)
					writer.close( );
	}

// in AndroidManifest.xml
<Activity
 android:screenOrientation="portrait" // or landscape

// in MyActivity.java
boolean mbOrientacionLandscape = false;
int nOrientation =	getResources().getConfiguration().orientation;
if(mbOrientacionLandscape==true){
	 getResources().getConfiguration();
	if(nOrientation != Configuration.ORIENTATION_LANDSCAPE)
	setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
	
}
else{
	if(nOrientation != Configuration.ORIENTATION_PORTRAIT)
	setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}