每次在android oreo上解锁设备时都会启动活动

Question

I am currently working on an app to launch an activity every time the device is unlocked, the following code works well for smaller devices with the Android api oreo.

Manifest:

<receiver
        android:name=".ScreenReceiver"
        android:enabled="true" >
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="android.intent.action.SCREEN_OFF" />
            <action android:name="android.intent.action.SCREEN_ON" />
            <action android:name="android.intent.action.USER_PRESENT" />
            <category android:name="android.intent.category.DEFAULT" >
            </category>
        </intent-filter>
    </receiver>

I also have in the manifest

 <uses-permission android: name ="android.permission.RECEIVE_BOOT_COMPLETED" />

ScreenReceiver class:

public class ScreenReceiver extends BroadcastReceiver {
ScreenReceiver screen;
Context context=null;
@Override
public void onReceive(Context context, Intent intent)
{
    this.context=context;
    if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)||intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)||intent.getAction().equals(Intent.ACTION_USER_PRESENT))
    {
        Intent i = new Intent(context, DictionaryView.class);
        i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(i);
    }
}

}

I need to launch an activity every time the phone is unlock the previous code works pretty well for earlier versions of Android Oreo, but this version does not work because it never starts the activity after unlocking the device. Friends please I need help takes a couple of hours looking for useful information without success.

Answer 1

You might need to ask for permission from the user

if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.RECEIVE_BOOT_COMPLETED)  != PackageManager.PERMISSION_GRANTED
            )
    {
        //REQUEST RUNTIME PERMISSION
        ActivityCompat.requestPermissions(this, new String[] {
                android.Manifest.permission.RECEIVE_BOOT_COMPLETED,                    
        }  ,    MY_PERMISSION_REQUEST_CODE);
    }

Then you will have to setup an overrride method to handle on requestpermissionresult

 @Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode)
    {
        case MY_PERMISSION_REQUEST_CODE:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
            {
               //do this
            }
    }
}

Answer 2

Try this:

Your code look like this:

<receiver android:name=".ScreenReceiver"
    android:enabled="true" >
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
        <action android:name="android.intent.action.SCREEN_OFF" />
        <action android:name="android.intent.action.SCREEN_ON" />
        <action android:name="android.intent.action.USER_PRESENT" />
        <category android:name="android.intent.category.DEFAULT" >
        </category>
    </intent-filter>

Please remove all tag in intent filter code look like this

<receiver android:name=".ScreenReceiver>
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"/>
        </intent-filter>

ScreenReceiver class:

public class ScreenReceiver extends BroadcastReceiver {
ScreenReceiver screen;
Context context=null;
   @Override
    public void onReceive(Context context, Intent intent) {
    if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
        Intent i = new Intent(context, DictionaryView.class);
        i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(i);
    }
}
}

try this i hope it helps you.