保持Activity永不銷燬……

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;

public class MainActivity extends Activity {
    private static final String tag = "MainActivity";
    @Override
protected void onCreate(Bundle savedInstanceState) {
        super
 
.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.e(tag, "onCreate method is onCreate");
    }
    @Override
public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main
 
, menu);
        return true;
    }
    @Override
protected void onDestroy() {
        Log.e(tag, "onCreate method is onDestroy");
        super.onDestroy();
    }
    @Override
public void finish() {
        /**
         * 記住不要執行此句 super.finish(); 因為這是父類已經實現了改方法
* 設定該activity永不過期，即不執行onDestroy()
         */
 
moveTaskToBack(true);
    }
}