Activity退出应用程序

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退出应用程序：

① 递归退出(XML页面太简单，就不贴出代码了)

② 栈退出：Application:多个组件之间数据共享（全局）

import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.TextView;import com.zking.application.MyApplication;public class MainActivity extends AppCompatActivity {    private TextView tv_main_text;    private MyApplication myApplication;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        tv_main_text = (TextView) findViewById(R.id.tv_main_text);        tv_main_text.setText("当前Activity实例："+this+"\n当前任务栈："+this.getTaskId());        //获取MyApplication        myApplication = (MyApplication) getApplication();        myApplication.add(this);    }    public void jumpMain(View view){        Intent intent=new Intent(this,MainActivity.class);        startActivity(intent);    }    public void jumpB(View view){        Intent intent=new Intent(this,BActivity.class);        startActivity(intent);        //startActivityForResult(intent,0x101);    }    public void exit(View view){       //finish();//退出当前的Activity        //System.exit(0);        myApplication.exit();    }//    @Override//    protected void onActivityResult(int requestCode, int resultCode, Intent data) {//        super.onActivityResult(requestCode, resultCode, data);//        exit(null);//    }    @Override    protected void onDestroy() {        super.onDestroy();        Log.i("test","onDestroy");    }}

import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.TextView;import com.zking.application.MyApplication;public class BActivity extends AppCompatActivity {    private MyApplication myApplication;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_b);        TextView tv_b_text= (TextView) findViewById(R.id.tv_b_text);        tv_b_text.setText("当前Activity地址："+this+"\nTaskId:"+this.getTaskId());        //获取MyApplication        myApplication = (MyApplication) getApplication();        myApplication.add(this);    }    public void jumpMain(View view){        Intent intent=new Intent(this,MainActivity.class);        startActivity(intent);    }    public void exit(View view){        //finish();         //System.exit(0);  //退出当前Activity        myApplication.exit();    }}

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