android - 关闭应用程序时屏幕开/关崩溃

Question

我正在检测应用打开或关闭时的屏幕开启/关闭时间

使用服务和广播接收器。它在应用程序运行或最小化时运行良好，但在关闭应用程序时它会崩溃。

如何在不崩溃的情况下关闭应用程序后获取屏幕打开/关闭时间。

logcat 错误

E/ActivityThread: Activity com.shah.neeraj.s.MainActivity has leaked IntentReceiver com.shah.neeraj.s.ScreeReceiver@8686ff5 that was originally registered here. Are you missing a call to unregisterReceiver()?
                  android.app.IntentReceiverLeaked: Activity com.shah.neeraj.s.MainActivity has leaked IntentReceiver com.shah.neeraj.s.ScreeReceiver@8686ff5 that was originally registered here. Are you missing a call to unregisterReceiver()?
                      at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:1159)
                      at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:946)
                      at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1330)
                      at android.app.ContextImpl.registerReceiver(ContextImpl.java:1310)
                      at android.app.ContextImpl.registerReceiver(ContextImpl.java:1304)
                      at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:586)
                      at com.shah.neeraj.s.MainActivity.onCreate(MainActivity.java:37)
                      at android.app.Activity.performCreate(Activity.java:6672)
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1140)
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2612)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2724)
                      at android.app.ActivityThread.-wrap12(ActivityThread.java)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1473)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:154)
                      at android.app.ActivityThread.main(ActivityThread.java:6123)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
Application terminated.

主 Activity

public class MainActivity extends Activity {
    TextView text1,text2,text3;   
    Date d,d1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);
        text1 = (TextView) findViewById(R.id.text1);
        text2 = (TextView) findViewById(R.id.text2);
        text3 =(TextView) findViewById(R.id.text3);    

        // INITIALIZE RECEIVER
       IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        BroadcastReceiver mReceiver = new ScreeReceiver();
        registerReceiver(mReceiver, filter);
//        unregisterReceiver(mReceiver);
        PowerManager pm =(PowerManager) getSystemService(Context.POWER_SERVICE);
        // YOUR CODE
    }

    @Override
    protected void onPause() {
        // WHEN THE SCREEN IS ABOUT TO TURN OFF
        if (ScreeReceiver.wasScreenOn)
        {
        //if (pm.isScreenOn() == false){
            // THIS IS THE CASE WHEN ONPAUSE() IS CALLED BY THE SYSTEM DUE TO A SCREEN STATE CHANGE

            d = new Date();
            CharSequence s = DateFormat.format("hh:mm:ss", d.getTime());

            System.out.println("SCREEN TURNED OFF");
            text1.setText("SCREEN TURNED OFF" + s);
            Log.i("hi", "s"+ s);  
        } else {
            // THIS IS WHEN ONPAUSE() IS CALLED WHEN THE SCREEN STATE HAS NOT CHANGED
        }
        super.onPause();    
    }

    @Override
    protected void onResume() {
        // ONLY WHEN SCREEN TURNS ON
        if (!ScreeReceiver.wasScreenOn) {
            // THIS IS WHEN ONRESUME() IS CALLED DUE TO A SCREEN STATE CHANGE

            d1 = new Date();
            CharSequence s1 = DateFormat.format("hh:mm:ss", d1.getTime());

            text2.setText("SCREEN TURNED ON" + s1);
            Log.i("hi", "s"+ s1);

            System.out.println("SCREEN TURNED ON");

            Timer updateTimer = new Timer();
            updateTimer.schedule(new TimerTask()
            {    
                public void run()
                {
                    try
                    {    
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {    
                                //stuff that updates ui
                                long diff = d1.getTime() - d.getTime();

                                int Hours = (int) (diff/( 1000* 60 * 60));
                                int Mins = (int) (diff/(1000*60)) % 60;

                                Log.i("Difference ", ""+ diff);

                                String diff1= Hours + ":" + Mins; // updated value every 60 second
                                text3.setText( diff1 );
                                Log.i("Differ", "diff"+ diff1);
                            }
                        });    
                    }
                    catch (Exception e)
                    {
                        e.printStackTrace();
                    }
                }    
            }, 0, 600000);    
        } else {
        }
        super.onResume();  
    }    

    @Override
    public void onDestroy() {
        super.onDestroy();
        //Log.d(msg, "The onDestroy() event");
        /*IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        BroadcastReceiver mReceiver = new ScreeReceiver();
        unregisterReceiver(mReceive);*/    
    }
}

屏幕接收器

public class ScreeReceiver extends BroadcastReceiver {
    public static boolean wasScreenOn = true;
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            // DO WHATEVER YOU NEED TO DO HERE
            wasScreenOn = false;
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            // AND DO WHATEVER YOU NEED TO DO HERE
            wasScreenOn = true;
        }
        Intent i = new Intent(context, UpdateService.class);
        i.putExtra("screen_state", wasScreenOn);
        context.startService(i);

        Toast.makeText(context, "Intent Detected.", Toast.LENGTH_LONG).show();
    }    
}

更新服务

public class UpdateService extends Service {
    TextView text1,text2,text3;
    @Override
    public void onCreate() {
        super.onCreate();
        // REGISTER RECEIVER THAT HANDLES SCREEN ON AND SCREEN OFF LOGIC
        IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        BroadcastReceiver mReceiver = new ScreeReceiver();
        registerReceiver(mReceiver, filter);
    }

    @Override
    public void onStart(Intent intent, int startId) {
        boolean screenOn = intent.getBooleanExtra("screen_state", false);
        if (!screenOn) {
           // YOUR CODE
            /* Date d = new Date();
            CharSequence s = DateFormat.format("hh:mm:ss", d.getTime());

            System.out.println("SCREEN TURNED OFF");
            text1.setText("SCREEN TURNED OFF" + s);
            Log.i("hi", "s"+ s);
            */
            Date d = new Date();
            CharSequence s = DateFormat.format("hh:mm:ss", d.getTime());

            System.out.println("SCREEN TURNED OFF");
            Log.i("hi Service t off", "s"+ s);

           // text1.setText("SCREEN TURNED OFF" + s);
            System.out.println("SCREEN  Off"+s);

        } else {
            // YOUR CODE
            Date  d1 = new Date();
            CharSequence s1 = DateFormat.format("hh:mm:ss", d1.getTime());

            //text2.setText("SCREEN TURNED ON" + s1);
            Log.i("hi Service t on ", "s"+ s1);

            System.out.println("SCREEN  ON"+s1);
        }
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }


    @Override
    public void onDestroy() {
        IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        BroadcastReceiver mReceiver = new ScreeReceiver();
        unregisterReceiver(mReceiver);
    }

list

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.shah.neeraj.s">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">

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

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


        </activity>

       <receiver android:name="ScreeReceiver">

           <intent-filter>
               <action android:name="android.intent.action.SCREEN_OFF"/>
               <action android:name="android.intent.action.SCREEN_ON"/>
           </intent-filter>
        </receiver>



        <service android:name=".UpdateService">

        </service>
    </application>

</manifest>

Answer 1

你的 Logcat 返回了什么

that was originally registered here. Are you missing a call to unregisterReceiver()?

首先声明 BroadcastReceiver 作为全局 & 你应该在下面调用 onPause() 方法

然后打开这个 onCreate() 部分。

unregisterReceiver(mReceive);

最后

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