public class Passwortaendern extends Activity implements View.OnClickListener{
	
	Button change;
	TextView antwort;
	EditText pwold;
	EditText pwnew1;
	EditText pwnew2;
	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.abfrage);
		
		ansicht();
		change.setOnClickListener(this);
		
		
	}
	private void ansicht() {
		// TODO Auto-generated method stub
		change = (Button) findViewById(R.id.pwch);
		antwort = (TextView) findViewById(R.id.chantwort);
		pwold = (EditText) findViewById(R.id.pwold);
		pwnew1 = (EditText) findViewById(R.id.pwnew1);
		pwnew2 = (EditText) findViewById(R.id.pwnew2);
	}
	public void onClick(View view) {
		// TODO Auto-generated method stub
			String checkpwold = pwold.getText().toString();
			String checkpwnew1 = pwnew1.getText().toString();
			String checkpwnew2 = pwnew2.getText().toString();
			String password = "left";
			antwort.setText(checkpwold);
			if (checkpwold.contentEquals("left")){
				if (checkpwnew1.contentEquals(checkpwnew2)){
					antwort.setText("Password geändert");
					antwort.setGravity(Gravity.CENTER);
					antwort.setTextColor(Color.GREEN);
					
			}
		}else{
			antwort.setText("Eingaben überprüfen");
			antwort.setGravity(Gravity.CENTER);
			antwort.setTextColor(Color.RED);
		}
		
	}
	

	
}

01-06 18:49:44.567: D/dalvikvm(5988): GC_EXTERNAL_ALLOC freed 42K, 50% free 2739K/5379K, external 319K/587K, paused 29ms
01-06 18:49:45.728: D/AndroidRuntime(5988): Shutting down VM
01-06 18:49:45.728: W/dalvikvm(5988): threadid=1: thread exiting with uncaught exception (group=0x40103560)
01-06 18:49:45.738: E/AndroidRuntime(5988): FATAL EXCEPTION: main
01-06 18:49:45.738: E/AndroidRuntime(5988): java.lang.RuntimeException: Unable to start activity ComponentInfo{test.projekt.manuel/test.projekt.manuel.Passwortaendern}: java.lang.ClassCastException: android.widget.TextView
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1768)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.app.ActivityThread.access$1500(ActivityThread.java:123)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.os.Handler.dispatchMessage(Handler.java:99)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.os.Looper.loop(Looper.java:130)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.app.ActivityThread.main(ActivityThread.java:3835)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at java.lang.reflect.Method.invokeNative(Native Method)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at java.lang.reflect.Method.invoke(Method.java:507)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at dalvik.system.NativeStart.main(Native Method)
01-06 18:49:45.738: E/AndroidRuntime(5988): Caused by: java.lang.ClassCastException: android.widget.TextView
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at test.projekt.manuel.Passwortaendern.ansicht(Passwortaendern.java:37)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at test.projekt.manuel.Passwortaendern.onCreate(Passwortaendern.java:28)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1722)
01-06 18:49:45.738: E/AndroidRuntime(5988): 	... 11 more

<TextView
        android:id="@+id/chantwort"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Passwörter eingeben"
        android:layout_gravity="center"
        android:textAppearance="?android:attr/textAppearanceLarge" />