Question

当我通过点击主页按钮关闭我的应用程序时，我看到onDestroy()方法被调用，在我重新打开它之后，它从头开始，这没关系。

但有时候，在我重新开启之后，我会在没有任何反应的情况下获得黑屏，并且没有任何方法被调用就像这里的第二张图片一样您可以看到第一张图片，“MyGame”是我重新打开的应用程序。

enter image description here

我很困惑。任何的想法？谢谢你的关注

MainActivity.java

public class MainActivity extends AppCompatActivity implements IOnRemoveViewListener, IStartGameViewFragment {

    public static int statusBarHeight = 0;
    public static int navigationBarHeight = 0;
    public static volatile PointF screenSize;
    private View decorView;
    private gameViewFragment gameViewFragment = new gameViewFragment();

    private FragmentManager manager;
    private FragmentTransaction transaction;

    private Handler handler = new Handler();
    private Runnable runnable = new Runnable() {
        @Override
        public void run() {
            addFragment(gameViewFragment, gameViewFragment.TAG);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setTheme(R.style.AppTheme);
        super.onCreate(savedInstanceState);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        decorView = getWindow().getDecorView();
        setOnSystemUiVisibilityChangeListener();
        // status bar height
        int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            statusBarHeight = getResources().getDimensionPixelSize(resourceId);
        }

        // navigation bar height
        resourceId = getResources().getIdentifier("navigation_bar_height", "dimen", "android");
        if (resourceId > 0) {
            navigationBarHeight = getResources().getDimensionPixelSize(resourceId);
        }
        manager = getSupportFragmentManager();
        setUiFlag();
        setContentView(R.layout.main);
    }

    @Override
    protected void onStart() {
        super.onStart();
        setUiFlag();
        if (manager.findFragmentByTag(splashFragment.TAG) == null)
            initFragments();
    }

    public void initFragments() {
        addFragment(new splashFragment(), splashFragment.TAG);
    }

    public void setUiFlag() {
        decorView.setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);

        boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);

        if (!hasBackKey) {
            decorView.setSystemUiVisibility(
                    View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                            | View.SYSTEM_UI_FLAG_FULLSCREEN
                            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
            // Do whatever you need to do, this device has a navigation bar
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        setUiFlag();
    }

    public void setOnSystemUiVisibilityChangeListener() {
        decorView.setOnSystemUiVisibilityChangeListener
            (new View.OnSystemUiVisibilityChangeListener() {
                @Override
                public void onSystemUiVisibilityChange(int visibility) {
                    // Note that system bars will only be "visible" if none of the
                    // LOW_PROFILE, HIDE_NAVIGATION, or FULLSCREEN flags are set.
                    if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
                        // TODO: The system bars are visible. Make any desired
                        // adjustments to your UI, such as showing the action bar or
                        // other navigational controls.
                        setUiFlag();
                    } else {
                        // TODO: The system bars are NOT visible. Make any desired
                        // adjustments to your UI, such as hiding the action bar or
                        // other navigational controls.
                    }
                }
            });
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        handler.removeCallbacks(runnable);
        popBackStack();
    }

    public void popBackStack() {
        manager.popBackStack();
    }

    @Override
    protected void onStop() {
        super.onStop();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        setUiFlag();
    }

    private void addFragment(Fragment fragment, String TAG) {
        transaction = manager.beginTransaction();
        transaction.setCustomAnimations(R.anim.enter_from_left, R.anim.exit_to_right, R.anim.enter_from_left, R.anim.exit_to_right);
        transaction.add(R.id.Container_frame_ly, fragment, TAG);
        transaction.addToBackStack(TAG);
        transaction.commit();
    }

    private void replaceFragment(Fragment fragment, String TAG) {
        transaction = manager.beginTransaction();
        transaction.setCustomAnimations(R.anim.enter_from_left, R.anim.exit_to_right, R.anim.enter_from_left, R.anim.exit_to_right);
        transaction.replace(R.id.Container_frame_ly, fragment, TAG);
        transaction.commit();
    }

    public void removeFragment(Fragment fragment) {
        transaction = manager.beginTransaction();
        transaction.setCustomAnimations(R.anim.enter_from_left, R.anim.exit_to_right, R.anim.enter_from_left, R.anim.exit_to_right);
        transaction.remove(fragment);
        transaction.commit();
    }

    @Override
    public void startGameViewFragment() {
        handler.postDelayed(runnable, 2000);
    }

}

style.xml

<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowBackground">@drawable/splash_drawable</item>
</style>

<style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowBackground">@drawable/splash_drawable</item>
    <item name="android:windowContentOverlay">@null</item>
</style>

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="game.development.mahdi.nazari.gameblak">

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="MyGame"
    android:supportsRtl="true"
    android:theme="@style/SplashTheme">
    <activity
        android:name=".MVC.Activity.MainActivity"
        android:configChanges="orientation|keyboardHidden|screenSize"
        android:screenOrientation="sensorLandscape"
        android:clearTaskOnLaunch="true"
        android:noHistory="true"
        android:launchMode="singleTask">

        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

    </activity>

</application>

应用程序在重新打开后变为黑屏

0 个答案: