浮动窗口崩溃(如果在应用终止时调用)

Question

我想在发生服务警报或呼叫时在屏幕顶部显示浮动布局。通常，当应用程序打开或在后台(在将其滑出之前(时，它会显示并运行良好。即使我杀死了应用程序，它仍然会显示(杀死=滑动应用程序(并且它仍在工作。但是，如果应用程序被杀死并且没有打开，它会尝试显示(例如从警报服务(它崩溃，终止应用程序后我什至看不到 android Studio 中的崩溃日志。 如何解决此问题或查找问题？

我的代码 警报 BroadCast 它调用的地方：(根据需要调用警报广播(

public class BroadcastManager extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Intent intent = new Intent(context,FloatingWindow.class);
startService(intent);
}

我的浮动视图代码：

import android.annotation.SuppressLint;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.os.Build;
import android.os.Handler;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.example.greenbook.greenlids.MainActivity;
import com.example.greenbook.greenlids.R;
public class FloatingWindow extends Service {
private WindowManager windowManager;
private LinearLayout layout;
private TextView txt;
private Button bttn1 , exitBttn;
private Context context;
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@SuppressLint("ClickableViewAccessibility")
@Override
public void onCreate() {
super.onCreate();

windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);

layout = new LinearLayout(this);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);
layout.setBackgroundColor(Color.argb(255,0,0,255));

layout.setLayoutParams(layoutParams);
final WindowManager.LayoutParams windowParams;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
windowParams = new WindowManager.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.TYPE_PHONE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.TRANSLUCENT);
windowParams.x = 0;
windowParams.y = 0;
windowParams.gravity = Gravity.CENTER;
}else{
windowParams = new WindowManager.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.TRANSLUCENT);
windowParams.x = 0;
windowParams.y = 0;
windowParams.gravity = Gravity.CENTER;
}
LayoutInflater layoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
if (layoutInflater != null) {
layout = (LinearLayout) layoutInflater.inflate(R.layout.linear_layout_floating_window, null);
}
layout.setBackgroundColor(Color.argb(255,240,240,255));
bttn1 = layout.findViewById(R.id.LLbutton);
exitBttn = layout.findViewById(R.id.exitBttn);
txt = layout.findViewById(R.id.noteTxt);
txt.setTextSize(18);
txt.setText("Natan");
exitBttn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
windowManager.removeView(layout);
stopSelf();
}
});
bttn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
boolean handler = new Handler().postDelayed(new Runnable() {
@Override
public void run() {
txt.setText("Natan The King");
}
}, 1000*5);
}
});
windowManager.addView(layout,windowParams);

layout.setOnTouchListener(new View.OnTouchListener() {
private WindowManager.LayoutParams updateParam = windowParams;
int x , y;
float touchedX , touchedY;


@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()){
case MotionEvent.ACTION_DOWN:
x = updateParam.x;
y = updateParam.y;
touchedX = event.getRawX();
touchedY = event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
updateParam.x = (int) (x+event.getRawX() - touchedX);
updateParam.y = (int) (y+event.getRawY() - touchedY);
windowManager.updateViewLayout(layout,updateParam);
break;
}
return false;
}
});
} 
}

日志猫更新：

06-18 11:59:00.263 6722-6722/? E/Zygote: isWhitelistProcess - Process is Whitelisted
06-18 11:59:00.264 6722-6722/? E/libpersona: scanKnoxPersonas
Couldn't open the File - /data/system/users/0/personalist.xml - No such file or directory
06-18 11:59:00.268 6722-6722/? W/SELinux: SELinux selinux_android_compute_policy_index : Policy Index[2],  Con:u:r:zygote:s0 RAM:SEPF_SM-G935F_8.0.0_0007, [-1 -1 -1 -1 0 1]
06-18 11:59:00.269 6722-6722/? I/SELinux: SELinux: seapp_context_lookup: seinfo=untrusted, level=s0:c512,c768, pkgname=com.example.greenbook.greenlids 
06-18 11:59:00.275 6722-6722/? I/zygote64: Late-enabling -Xcheck:jni
06-18 11:59:00.341 6722-6722/? D/TimaKeyStoreProvider: TimaKeyStore is not enabled: cannot add TimaSignature Service and generateKeyPair Service
06-18 11:59:00.341 6722-6722/? D/ActivityThread: Added TimaKeyStore provider
06-18 11:59:00.422 6722-6722/com.example.greenbook.greenlids I/zygote64: no shared libraies, dex_files: 1
06-18 11:59:00.723 6722-6722/com.example.greenbook.greenlids I/InstantRun: starting instant run server: is main process
06-18 11:59:00.750 6722-6722/com.example.greenbook.greenlids D/AndroidRuntime: Shutting down VM

--------- beginning of crash
06-18 11:59:00.755 6722-6722/com.example.greenbook.greenlids E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.greenbook.greenlids, PID: 6722
java.lang.RuntimeException: Unable to start receiver com.example.greenbook.greenlids.models.BroadcastManager: java.lang.IllegalStateException: Not allowed to start service Intent { cmp=com.example.greenbook.greenlids/.floating_window.FloatingWindow }: app is in background uid UidRecord{1651455 u0a451 RCVR idle procs:1 seq(0,0,0)}
at android.app.ActivityThread.handleReceiver(ActivityThread.java:3399)
at android.app.ActivityThread.-wrap18(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1780)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.lang.IllegalStateException: Not allowed to start service Intent { cmp=com.example.greenbook.greenlids/.floating_window.FloatingWindow }: app is in background uid UidRecord{1651455 u0a451 RCVR idle procs:1 seq(0,0,0)}
at android.app.ContextImpl.startServiceCommon(ContextImpl.java:1538)
at android.app.ContextImpl.startService(ContextImpl.java:1484)
at android.content.ContextWrapper.startService(ContextWrapper.java:663)
at android.content.ContextWrapper.startService(ContextWrapper.java:663)
at com.example.greenbook.greenlids.models.BroadcastManager.onReceive(BroadcastManager.java:40)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:3392)
at android.app.ActivityThread.-wrap18(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1780) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6944) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) 

Answer 1

在某些情况下，后台应用程序会暂时被列入白名单几分钟。当应用程序在白名单上时，它可以不受限制地启动服务，并且允许其后台服务运行。当应用处理用户可见的任务时，系统会将其列入白名单，例如：

处理高优先级的 Firebase 云消息 (FCM( 消息。 接收广播，例如短信/彩信。 从通知执行挂起的意图。 在 VPN 应用将自身提升到前台之前启动 VpnService。 取自下面的链接 我在这里找到了答案： https://stackoverflow.com/a/46445436/8675712 https://stackoverflow.com/a/47654126/8675712