Android 實現雙擊退出的功能_Android

實現android雙擊後退鍵退出當前APP功能

實現該功能基本思路是，

1， 監聽後退鍵 ， 比較兩次後退間隔 ， 低於兩秒則出發退出

2， 退出當前APP

我選擇在基類中BaseActivity 中設定監聽，代碼如下：

 public void onBackPressed() {    //Preferences 中擷取是否雙擊退出    boolean isDoubleClick = true;    //BaseApplication.get("ifDoubleClickedBack", true);    if (isDoubleClick) {      long curTime = SystemClock.uptimeMillis();      if ((curTime - mBackPressedTime) < (2 * 1000)) {        finish();        //activity棧管理        AppManager.getAppManager().AppExit();      } else {        mBackPressedTime = curTime;        Toast.makeText(this, "再次點擊退出", Toast.LENGTH_SHORT).show();      }    } else {      finish();    }  }

在退出當前APP中，參考開源中國，封裝了activity棧

執行個體代碼：

public class AppManager {  private static Stack<Activity> activityStack;  private static AppManager instance;  private AppManager() {  }  /**   * 單一執行個體   */  public static AppManager getAppManager() {    if (instance == null) {      instance = new AppManager();    }    if (activityStack == null) {      activityStack = new Stack<Activity>();    }    return instance;  }  /**   * 擷取指定的Activity   *   * @author kymjs   */  public static Activity getActivity(Class<?> cls) {    if (activityStack != null)      for (Activity activity : activityStack) {        if (activity.getClass().equals(cls)) {          return activity;        }      }    return null;  }  /**   * 添加Activity到堆棧   */  public void addActivity(Activity activity) {    activityStack.add(activity);  }  /**   * 擷取當前Activity（堆棧中最後一個壓入的）   */  public Activity currentActivity() {    Activity activity = activityStack.lastElement();    return activity;  }  /**   * 結束當前Activity（堆棧中最後一個壓入的）   */  public void finishActivity() {    Activity activity = activityStack.lastElement();    finishActivity(activity);  }  /**   * 結束指定的Activity   */  public void finishActivity(Activity activity) {    if (activity != null && activityStack.contains(activity)) {      activityStack.remove(activity);      activity.finish();    }  }  /**   * 結束指定的Activity   */  public void removeActivity(Activity activity) {    if (activity != null && activityStack.contains(activity)) {      activityStack.remove(activity);    }  }  /**   * 結束指定類名的Activity   */  public void finishActivity(Class<?> cls) {    for (Activity activity : activityStack) {      if (activity.getClass().equals(cls)) {        finishActivity(activity);        break;      }    }  }  /**   * 結束所有Activity   */  public void finishAllActivity() {    for (int i = 0, size = activityStack.size(); i < size; i++) {      if (null != activityStack.get(i)) {        finishActivity(activityStack.get(i));      }    }    activityStack.clear();  }  /**   * 退出應用程式   */  public void AppExit() {    try {      finishAllActivity();      // System.exit(0);    } catch (Exception e) {    }  }}

思路就是在每次activity 壓入activity棧中管理

在退出時遍曆棧，挨個finish

希望本文所述對大家的Android程式設計有所協助。