Question

每当我的android应用程序进入后台时，我总是希望每次应用程序来自后台时都打开我的密码活动，如何在我的代码中实现此功能？

Answer 1

请按以下步骤操作：

添加新班级全球

public class Global extends Application
{

private static Global mInstance;

@Override
public void onCreate() {
    super.onCreate();

    mInstance = this;

    ApplicationLifeCycleHandler handler = new ApplicationLifeCycleHandler();
    registerActivityLifecycleCallbacks(handler);
    registerComponentCallbacks(handler);
}


public static Global getInstance(){
    return mInstance;
}
}

在您的清单中添加此行，例如

  <application
        android:name=".Global"
  </application>

添加此课程并在应用程序背景到前景时打开密码意图，如

  public class ApplicationLifeCycleHandler implements Application.ActivityLifecycleCallbacks, ComponentCallbacks2 {

public static Activity activity;

private static final String TAG = ApplicationLifeCycleHandler.class.getSimpleName();
public static boolean isInBackground = true;

@Override
public void onActivityCreated(Activity activity, Bundle bundle) {
}

@Override
public void onActivityStarted(Activity activity) {
    this.activity = activity;
}

@Override
public void onActivityResumed(Activity activity) {
    this.activity = activity;

    if (isInBackground) {

        Intent intent = new Intent(activity, PasswordActivity.class);//set your password activity 
        activity.startActivity(intent);

        Log.d(TAG, "app went to foreground");
        isInBackground = false;
    }
}

@Override
public void onActivityPaused(Activity activity) {
}

@Override
public void onActivityStopped(Activity activity) {
}

@Override
public void onActivitySaveInstanceState(Activity activity, Bundle bundle) {
}

@Override
public void onActivityDestroyed(Activity activity) {
}

@Override
public void onConfigurationChanged(Configuration configuration) {
}

@Override
public void onLowMemory() {
}

@Override
public void onTrimMemory(int i) {
    if (i == ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN) {
        Log.d(TAG, "app went to background");
        isInBackground = true;

    }
}
}

希望它会对您有所帮助，如果您遇到任何问题，请告诉我。感谢

从后台打开android应用程序

1 个答案: