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[英]Android: WebView app crashes after 3 seconds of showing Splash screen
[英]Android app opens after a few seconds after pressing home button during splash screen
我有一個問題,我似乎無法弄清楚原因。
啟動應用程序時,在完成並開始新活動之前,首先會顯示啟動畫面2.5秒。 如果您在此期間按住主頁或后退按鈕,應用程序將正常關閉。 但是,幾秒鍾后(超過2.5),應用程序將打開並從啟動屏幕后的活動開始。
任何幫助,為什么會發生這種情況,我
這是Splash屏幕的實現(我確實不相信這里導致這個問題,因為我嘗試了不同的實現)
`public class SplashScreenActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
Thread myThread = new Thread(){
@Override
public void run() {
try {
sleep(2500);
Intent intent = new Intent(getApplicationContext(),MainActivity.class);
startActivity(intent);
finish();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
myThread.start();`
這是清單
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".activities.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar"
android:launchMode = "singleInstance">
</activity>
<activity android:name=".activities.SplashScreenActivity"
android:theme="@style/Theme.AppCompat.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".alert.BroadCaster" >
</receiver>
<service android:name=".timer.TimerService"
android:process=":timerservice" />
</application>
這是因為您正在創建一個新Thread
並且在您將應用程序置於后台后,此線程仍然存在。 您可以使用Handler
程序更改方法。 如果您需要,如果啟動畫面在后台,則您的下一個Activity
將無法啟動,您必須在延遲開始之前存儲當前時間。
private static final long SPLASH_SCREEN_MS = 2500;
private long mTimeBeforeDelay;
private Handler mSplashHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
// Create a new Handler.
mSplashHandler = new Handler();
}
@Override
protected void onResume() {
super.onResume();
// The first time mTimeBeforeDelay will be 0.
long gapTime = System.currentTimeMillis() - mTimeBeforeDelay;
if (gapTime > SPLASH_SCREEN_MS) {
gapTime = SPLASH_SCREEN_MS;
}
mSplashHandler.postDelayed(new Runnable() {
@Override
public void run() {
Intent intent = new Intent(SplashScreenActivity.this, MainActivity.class);
startActivity(intent);
SplashScreenActivity.this.finish();
}
}, gapTime);
// Save the time before the delay.
mTimeBeforeDelay = System.currentTimeMillis();
}
@Override
protected void onPause() {
super.onPause();
mSplashHandler.removeCallbacksAndMessages(null);
}
只需使用處理程序而不是像這樣的線程睡眠
new Handler().postDelayed(new Runnable(){
@Override
public void run() {
Intent intent = new Intent(SplashScreenActivity.this, MainActivity.class);
startActivity(intent);
SplashScreenActivity.this.finish();
}
}, SPLASH_DURATION);
只有在想要保存數據和內存時,才需要實現onStop()
方法。
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