我想在用户从主屏幕按下返回键时结束我的应用程序。我尝试使用System.exit(0)
,但它似乎没有工作。如何在android中手动结束应用程序?
我需要手动结束我的应用程序?
package com.mahavega.qcdemo;
import com.mahavega.qcdemo.R;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.GestureDetector;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.View.OnClickListener;
import android.widget.ImageView;
public class MainActivity extends Activity implements OnClickListener {
private GestureDetector gestureDetector;
View.OnTouchListener gestureListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gestureDetector = new GestureDetector(this, new MyGestureDetector());
gestureListener = new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
};
ImageView ad = (ImageView) findViewById(R.id.imageView1);
ImageView im2 = (ImageView) findViewById(R.id.imageView2);
ImageView im3 = (ImageView) findViewById(R.id.imageView3);
ImageView im4 = (ImageView) findViewById(R.id.imageView4);
ImageView im5 = (ImageView) findViewById(R.id.imageView5);
ad.setOnClickListener(MainActivity.this);
im2.setOnTouchListener(gestureListener);
im2.setOnClickListener(MainActivity.this);
im3.setOnTouchListener(gestureListener);
im3.setOnClickListener(MainActivity.this);
im4.setOnTouchListener(gestureListener);
im4.setOnClickListener(MainActivity.this);
im5.setOnTouchListener(gestureListener);
im5.setOnClickListener(MainActivity.this);
ad.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(MainActivity.this, Adds.class));
}
});
}
@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;
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling (MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
{
float sensitvity = 50;
if((e1.getX() - e2.getX()) < sensitvity){
startActivity(new Intent(MainActivity.this, Login.class));
}
return super.onFling(e1, e2, velocityX, velocityY);
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
System.exit(0);
finish();
super.onBackPressed();
}
}
这是我的全部代码
如何在主屏幕上按回退键关闭您的应用程序?为了使'onBackPressed()'工作,它使用的Activity应该是_running_。如果您在主屏幕上,您的应用可能会被_paused_或_stopped_。 – 2013-03-27 11:14:26
我的意思是我的应用程序的主屏幕 – o3n 2013-03-27 11:16:24
那么你应该在OP中指定那个? ;-)除非另有说明,否则主屏幕将被用于Android主屏幕。 – 2013-03-27 11:18:22