Android 中开启多个Activity后怎么随时退出程序

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在进入好多个Activity之后,我们想要直接退出后程序,怎么办?

直接上代码吧>

一 . 新建一个ActivityCollector类作为活动管理器

public class ActivityCollector {
    public static List<Activity> activities = new ArrayList<>();

    public static void addActivity(Activity activity){
        activities.add(activity);
    }

    public static void removeActivity(Activity activity){
        activities.remove(activity);
    }

    public static void finishAll(){
        for(Activity activity : activities){
            if(!activity.isFinishing()){
                activity.finish();
            }
        }
        activities.clear();
    }
}

二 . 修改基类BaseActivity的代码

public class BaseActivity extends AppCompatActivity {
    
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityCollector.addActivity(this);
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        ActivityCollector.removeActivity(this);

    }
}

三 . 在ThirdActivity中执行退出操作

public class ThirdActivity extends BaseActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_third);
        Button button = findViewById(R.id.btn3);
        //退出程序
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ActivityCollector.finishAll();
                //杀死进程,保证程序完全退出 (导os包)
                Process.killProcess(Process.myPid());
            }
        });
    }
}