ANR

1：一些基本概念

a: 主线程，子线程的关系，凭什么你是主线程，我是子线程？

其实线程都是一样，只是我们指定了某一线程为主进程而已。

b: 为什么Activity.onCreate，Broadcast.onReceiver，Service.onBind等一系列方法在主线程运行呢？

通过查看以上这些方法调用方，就可以知道答案了。他们都是通过handler消息来处理的
android.app.ActivityThread.H#handleMessage
            case RECEIVER:
                Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "broadcastReceiveComp");
                handleReceiver((ReceiverData)msg.obj);
                Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
                break;

具体流程参考：
https://www.jianshu.com/p/b114cf78b297
https://blog.csdn.net/renshuguo123723/article/details/86471734

c: 想要监控咱们APP的各种事件消耗的时间，咱们就可以通过监控主线程的handler 的handleMessage消耗的时间来查看。
查看handler代码：

// android.os.Looper#loop
        if (logging != null) {
            logging.println(">>>>> Dispatching to " + msg.target + " " +
                    msg.callback + ": " + msg.what);
        }
        msg.target.dispatchMessage(msg); //分发消息
        if (logging != null) {
            logging.println("<<<<< Finished to " + msg.target + " " + msg.callback);
        }

刚好这个logging对象可以自定义，然后我们重写println方法，通过比较两条消息时间差，就可以得知当前事件的执行时间。

android.os.Looper#setMessageLogging

2：ANR是啥呢？

Android系统中，ActivityManagerService(简称AMS)和WindowManagerService(简称WMS)会检测App的响应时间，如果App在特定时间无法相应屏幕触摸或键盘输入时间，或者特定事件没有处理完毕，就会出现ANR，即Application Not Responding。

3：ANR的种类，产生条件？

在某一事件后的某一时间之后，系统还未做出对应响应，就会产生ANR

事件	时间	关键日志
用户输入	5S	Input event dispatching timed out
广播	前台10S，后台60S	Timeout of broadcast BroadcastRecord
服务	前台10S，后台	Timeout executing service
content provider	10S	Timeout publishing content providers

为什么是这个时间？

    // ActivityTaskManagerService.java  API 30
    // How long we wait until we timeout on key dispatching.
    public static final int KEY_DISPATCHING_TIMEOUT_MS = 5 * 1000;

    // ActivityManagerService.java  API 30
    // How long we allow a receiver to run before giving up on it.
    static final int BROADCAST_FG_TIMEOUT = 10*1000;
    static final int BROADCAST_BG_TIMEOUT = 60*1000;

    // ActiveServices.java   API  30
    // How long we wait for a service to finish executing.
    static final int SERVICE_TIMEOUT = 20*1000;
    // How long we wait for a service to finish executing.
    static final int SERVICE_BACKGROUND_TIMEOUT = SERVICE_TIMEOUT * 10;

来看个例子，猜猜看，当我们点击button时，会产生ANR吗？：

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mViewDataBinding = DataBindingUtil.setContentView(this,
                R.layout.activity_main);
        mViewDataBinding.button
                .setOnClickListener(v -> {
                    Toast.makeText(this, "dianji", Toast.LENGTH_SHORT).show();
                    waitTime();
                });
    }

    private void waitTime() {
        long start = System.currentTimeMillis();
        long end = start;
        while (end - start < 8000) {
            mViewDataBinding.button.setText(end + "");
            end = System.currentTimeMillis();
        }
    }

注意事项: Input的超时机制与其他的不同，对于input来说即便某次事件执行时间超过timeout时长，只要用户后续在没有再生成输入事件，则不会触发ANR.

----- pid 6416 at 2021-05-31 01:25:26 -----
Cmd line: com.example.myapplication

DALVIK THREADS (16):
"main" prio=5 tid=1 Runnable
  | group="main" sCount=0 dsCount=0 flags=0 obj=0x70e9ac28 self=0xe6cc5410
  | sysTid=6416 nice=-10 cgrp=top-app sched=0/0 handle=0xf525b478
  | state=R schedstat=( 7028777690 179773124 1205 ) utm=23 stm=679 core=3 HZ=100
  | stack=0xff6af000-0xff6b1000 stackSize=8192KB
  | held mutexes= "mutator lock"(shared held)
  at com.example.myapplication.MainActivity.waitTime(MainActivity.java:31)
  at com.example.myapplication.MainActivity.lambda$onCreate$0$MainActivity(MainActivity.java:24)
  at com.example.myapplication.-$$Lambda$MainActivity$jRtpOGtrw8cqMNyhtDGNK0XOTPE.onClick(lambda:-1)
  at android.view.View.performClick(View.java:7448)
  at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:967)
  at android.view.View.performClickInternal(View.java:7425)
  at android.view.View.access$3600(View.java:810)
  at android.view.View$PerformClick.run(View.java:28305)
  at android.os.Handler.handleCallback(Handler.java:938)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:223)
  at android.app.ActivityThread.main(ActivityThread.java:7656)
  at java.lang.reflect.Method.invoke(Native method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

再来看看监控信息：

        Looper.getMainLooper().setMessageLogging(new Printer() {
            //分发和处理消息开始前的log
            private static final String START = ">>>>> Dispatching";
            //分发和处理消息结束后的log
            private static final String END = "<<<<< Finished";

            @Override
            public void println(String x) {
                if (x.startsWith(START)) {
                    //开始计时
                    BlockMonitor.getInstance().startMonitor();
                }
                if (x.startsWith(END)) {
                    //结束计时
                    BlockMonitor.getInstance().removeMonitor();
                }
            }
        });

public class BlockMonitor {
    private static final String TAG = "=====BlockMonitor=====";
    private static final BlockMonitor sInstance = new BlockMonitor();
    private final Handler mHandler;
    //方法耗时的卡口,500毫秒
    private static final long TIME_BLOCK = 500L;
    private int mCount;

    private BlockMonitor() {
        HandlerThread logThread = new HandlerThread("BlockMonitor");
        logThread.start();
        mHandler = new Handler(logThread.getLooper());
    }

    private final Runnable mLogRunnable = new Runnable() {
        @Override
        public void run() {
            //继续检测
            startMonitor();
            mCount++;
            //打印出执行的耗时方法的栈消息
            StackTraceElement[] stackTrace = Looper.getMainLooper().getThread().getStackTrace();
            StringBuilder sb = new StringBuilder();
            for (StackTraceElement s : stackTrace) {
                sb.append(s.toString());
                sb.append("\n");
            }
            String s = sb.toString();
            Log.e(BlockMonitor.TAG, "mCount--- " + mCount + s);
        }
    };

    public static BlockMonitor getInstance() {
        return sInstance;
    }

    /**
     * 开始计时
     */
    public void startMonitor() {
        mHandler.postDelayed(mLogRunnable, TIME_BLOCK);
    }

    /**
     * 停止计时
     */
    public void removeMonitor() {
        mHandler.removeCallbacks(mLogRunnable);
        mCount = 0;
    }
}
代码来源：https://blog.csdn.net/itobot/article/details/88930669

2021-05-31 09:26:33.915 6646-6697/com.example.myapplication E/=====BlockMonitor=====: mCount--- 14java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:542)
    java.lang.StringBuilder.append(StringBuilder.java:176)
    java.lang.StringBuilder.append(StringBuilder.java:77)
    android.icu.impl.CaseMapImpl.appendUnchanged(CaseMapImpl.java:407)
    android.icu.impl.CaseMapImpl.internalToUpper(CaseMapImpl.java:591)
    android.icu.impl.CaseMapImpl.toUpper(CaseMapImpl.java:650)
    android.icu.text.CaseMap$Upper.apply(CaseMap.java:170)
    android.text.TextUtils.toUpperCase(TextUtils.java:1198)
    android.text.method.AllCapsTransformationMethod.getTransformation(AllCapsTransformationMethod.java:66)
    android.widget.TextView.setText(TextView.java:6268)
    android.widget.TextView.setText(TextView.java:6139)
    android.widget.TextView.setText(TextView.java:6091)
    com.example.myapplication.MainActivity.waitTime(MainActivity.java:32)
    com.example.myapplication.MainActivity.lambda$onCreate$0$MainActivity(MainActivity.java:24)
    com.example.myapplication.-$$Lambda$MainActivity$jRtpOGtrw8cqMNyhtDGNK0XOTPE.onClick(Unknown Source:2)
    android.view.View.performClick(View.java:7448)
    com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:967)
    android.view.View.performClickInternal(View.java:7425)
    android.view.View.access$3600(View.java:810)
    android.view.View$PerformClick.run(View.java:28305)
    android.os.Handler.handleCallback(Handler.java:938)
    android.os.Handler.dispatchMessage(Handler.java:99)
    android.os.Looper.loop(Looper.java:223)
    android.app.ActivityThread.main(ActivityThread.java:7656)
    java.lang.reflect.Method.invoke(Native Method)
    com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
    com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
2021-05-31 09:26:34.417 6646-6697/com.example.myapplication E/=====BlockMonitor=====: mCount--- 15android.icu.impl.CaseMapImpl.internalToUpper(CaseMapImpl.java:534)
    android.icu.impl.CaseMapImpl.toUpper(CaseMapImpl.java:650)
    android.icu.text.CaseMap$Upper.apply(CaseMap.java:170)
    android.text.TextUtils.toUpperCase(TextUtils.java:1198)
    android.text.method.AllCapsTransformationMethod.getTransformation(AllCapsTransformationMethod.java:66)
    android.widget.TextView.setText(TextView.java:6268)
    android.widget.TextView.setText(TextView.java:6139)
    android.widget.TextView.setText(TextView.java:6091)
    com.example.myapplication.MainActivity.waitTime(MainActivity.java:32)
    com.example.myapplication.MainActivity.lambda$onCreate$0$MainActivity(MainActivity.java:24)
    com.example.myapplication.-$$Lambda$MainActivity$jRtpOGtrw8cqMNyhtDGNK0XOTPE.onClick(Unknown Source:2)
    android.view.View.performClick(View.java:7448)
    com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:967)
    android.view.View.performClickInternal(View.java:7425)
    android.view.View.access$3600(View.java:810)
    android.view.View$PerformClick.run(View.java:28305)
    android.os.Handler.handleCallback(Handler.java:938)
    android.os.Handler.dispatchMessage(Handler.java:99)
    android.os.Looper.loop(Looper.java:223)
    android.app.ActivityThread.main(ActivityThread.java:7656)
    java.lang.reflect.Method.invoke(Native Method)
    com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
    com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

再来看个等锁：

public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity--";
    private ActivityMainBinding mViewDataBinding;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mViewDataBinding = DataBindingUtil.setContentView(this,
                R.layout.activity_main);

        mViewDataBinding.button
                .setOnClickListener(v -> {
                    toast2();
                });

        new Thread() {
            @Override
            public void run() {
                super.run();
                toast1();
            }
        }.start();
    }

    public synchronized void toast1() {
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public synchronized void toast2() {
        Toast.makeText(this, "hahaha", Toast.LENGTH_SHORT).show();
    }
}

----- pid 7736 at 2021-05-31 02:54:05 -----
Cmd line: com.example.myapplication

"main" prio=5 tid=1 Blocked
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x70e9ac28 self=0xe6cc5410
  | sysTid=7736 nice=-10 cgrp=top-app sched=0/0 handle=0xf525b478
  | state=S schedstat=( 935875280 95958190 467 ) utm=37 stm=55 core=0 HZ=100
  | stack=0xff6af000-0xff6b1000 stackSize=8192KB
  | held mutexes=
  at com.example.myapplication.MainActivity.toast2(MainActivity.java:-1)
  - waiting to lock <0x0d672707> (a com.example.myapplication.MainActivity) held by thread 22
  at com.example.myapplication.MainActivity.lambda$onCreate$0$MainActivity(MainActivity.java:23)
  at com.example.myapplication.-$$Lambda$MainActivity$jRtpOGtrw8cqMNyhtDGNK0XOTPE.onClick(lambda:-1)
  at android.view.View.performClick(View.java:7448)
  at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:967)
  at android.view.View.performClickInternal(View.java:7425)
  at android.view.View.access$3600(View.java:810)
  at android.view.View$PerformClick.run(View.java:28305)
  at android.os.Handler.handleCallback(Handler.java:938)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:223)
  at android.app.ActivityThread.main(ActivityThread.java:7656)
  at java.lang.reflect.Method.invoke(Native method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
  
  "Thread-2" prio=5 tid=22 Sleeping
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x13182d90 self=0xe6cd5e10
  | sysTid=7764 nice=0 cgrp=top-app sched=0/0 handle=0xc54bc1e0
  | state=S schedstat=( 571026 0 1 ) utm=0 stm=0 core=2 HZ=100
  | stack=0xc53b9000-0xc53bb000 stackSize=1040KB
  | held mutexes=
  at java.lang.Thread.sleep(Native method)
  - sleeping on <0x06a79777> (a java.lang.Object)
  at java.lang.Thread.sleep(Thread.java:442)
  - locked <0x06a79777> (a java.lang.Object)
  at java.lang.Thread.sleep(Thread.java:358)
  at com.example.myapplication.MainActivity.toast1(MainActivity.java:37)
  - locked <0x0d672707> (a com.example.myapplication.MainActivity)
  at com.example.myapplication.MainActivity$1.run(MainActivity.java:30)

广播例子：

Process: com.example.myapplication
PID: 8141
UID: 10153
Flags: 0x30e8bf46
Package: com.example.myapplication v1 (1.0)
Foreground: Yes
Process-Runtime: 15023
Subject: Broadcast of Intent { act=android.intent.action.SCREEN_ON flg=0x50200010 }
Build: google/sdk_gphone_x86_arm/generic_x86_arm:11/RSR1.201013.001/6903271:userdebug/dev-keys

----- Output from /proc/pressure/memory -----
some avg10=0.08 avg60=0.07 avg300=0.01 total=3675977
full avg10=0.05 avg60=0.04 avg300=0.00 total=555677
----- End output from /proc/pressure/memory -----

CPU usage from 21530ms to 0ms ago (2021-05-31 03:08:00.773 to 2021-05-31 03:08:22.303):
  8% 604/system_server: 0.9% user + 7.1% kernel / faults: 4464 minor 17 major
  2.6% 335/surfaceflinger: 0% user + 2.5% kernel / faults: 36 minor 4 major
  2.1% 2701/com.google.android.googlequicksearchbox:search: 0.6% user + 1.4% kernel / faults: 5069 minor 3 major
  1.9% 304/android.hardware.bluetooth@1.1-service.sim: 0% user + 1.9% kernel
  1.6% 314/android.hardware.graphics.composer@2.3-service: 0% user + 1.6% kernel / faults: 2 major
  1.3% 866/com.android.systemui: 0.3% user + 1% kernel / faults: 1041 minor 2 major
  1.2% 2179/com.google.android.gms: 0.2% user + 0.9% kernel / faults: 2276 minor 6 major
  1.1% 1294/com.google.android.gms.persistent: 0.3% user + 0.7% kernel / faults: 1249 minor 4 major
  0.9% 170/logd: 0% user + 0.9% kernel / faults: 1 minor 2 major
  0.9% 313/android.hardware.graphics.allocator@3.0-service: 0% user + 0.9% kernel
  0.6% 355/adbd: 0% user + 0.6% kernel / faults: 285 minor
  0.5% 1104/com.google.android.apps.nexuslauncher: 0.1% user + 0.3% kernel / faults: 267 minor
  0.3% 216/android.system.suspend@1.0-service: 0% user + 0.2% kernel / faults: 10 minor 3 major
  0.3% 322/android.hardware.sensors@2.1-service.multihal: 0% user + 0.3% kernel
  0% 846/com.android.bluetooth: 0% user + 0% kernel / faults: 354 minor 11 major
  0.3% 1163/com.android.phone: 0% user + 0.2% kernel / faults: 179 minor
  0.3% 1626/com.google.process.gservices: 0% user + 0.3% kernel / faults: 353 minor
  0.1% 337/logcat: 0% user + 0.1% kernel
  0.1% 1472/com.google.android.inputmethod.latin: 0% user + 0.1% kernel / faults: 122 minor 1 major
  0.1% 10/rcu_preempt: 0% user + 0.1% kernel
  0.1% 171/lmkd: 0% user + 0.1% kernel
  0.1% 297/statsd: 0% user + 0.1% kernel
  0.1% 8089/logcat: 0% user + 0.1% kernel / faults: 7 minor
  0.1% 8096/kworker/u8:4-kverityd: 0% user + 0.1% kernel
  0% 1/init: 0% user + 0% kernel / faults: 1 minor
  0% 9/ksoftirqd/0: 0% user + 0% kernel
  0% 366/traced_probes: 0% user + 0% kernel / faults: 1 minor
  0% 16/ksoftirqd/1: 0% user + 0% kernel
  0% 21/ksoftirqd/2: 0% user + 0% kernel
  0% 26/ksoftirqd/3: 0% user + 0% kernel
  0% 172/servicemanager: 0% user + 0% kernel
  0% 212/jbd2/dm-5-8: 0% user + 0% kernel
  0% 300/zygote: 0% user + 0% kernel / faults: 166 minor
  0% 315/android.hardware.health@2.1-service: 0% user + 0% kernel
  0% 325/android.hardware.wifi@1.0-service: 0% user + 0% kernel
  0% 374/iorapd: 0% user + 0% kernel / faults: 24 minor
  0% 380/wificond: 0% user + 0% kernel
  0% 2872/com.google.android.ims: 0% user + 0% kernel / faults: 32 minor
  0% 4697/com.google.android.googlequicksearchbox:interactor: 0% user + 0% kernel / faults: 16 minor
  0% 6833/com.google.android.videos: 0% user + 0% kernel / faults: 9 minor
  0% 7353/kworker/3:1-mm_percpu_wq: 0% user + 0% kernel
  0% 7365/com.google.process.gapps: 0% user + 0% kernel / faults: 163 minor
  0% 7447/kworker/0:1-events: 0% user + 0% kernel
  0% 7522/kworker/u8:3-events_unbound: 0% user + 0% kernel
  0% 8092/kworker/u8:2-kverityd: 0% user + 0% kernel
 +0% 8140/kworker/2:1-events: 0% user + 0% kernel
 +0% 8141/com.example.myapplication: 0% user + 0% kernel
18% TOTAL: 1% user + 17% kernel + 0.4% iowait + 0% softirq

----- pid 8141 at 2021-05-31 03:08:22 -----
Cmd line: com.example.myapplication

"main" prio=5 tid=1 Runnable
  | group="main" sCount=0 dsCount=0 flags=0 obj=0x70e9ac28 self=0xe6cc5410
  | sysTid=8141 nice=-10 cgrp=top-app sched=0/0 handle=0xf525b478
  | state=R schedstat=( 11098270485 152588332 1096 ) utm=24 stm=1085 core=0 HZ=100
  | stack=0xff6af000-0xff6b1000 stackSize=8192KB
  | held mutexes= "mutator lock"(shared held)
  at com.example.myapplication.MainActivity.waitTime(MainActivity.java:37)
  at com.example.myapplication.MainActivity.access$000(MainActivity.java:14)
  at com.example.myapplication.MainActivity$1.onReceive(MainActivity.java:29)
  at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$getRunnable$0$LoadedApk$ReceiverDispatcher$Args(LoadedApk.java:1556)
  at android.app.-$$Lambda$LoadedApk$ReceiverDispatcher$Args$_BumDX2UKsnxLVrE6UJsJZkotuA.run(lambda:-1)
  at android.os.Handler.handleCallback(Handler.java:938)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:223)
  at android.app.ActivityThread.main(ActivityThread.java:7656)
  at java.lang.reflect.Method.invoke(Native method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

binder通信 :

Process: com.example.myapplication
PID: 12020
UID: 10153
Flags: 0x30e8bf46
Package: com.example.myapplication v1 (1.0)
Foreground: Yes
Process-Runtime: 10051
Activity: com.example.myapplication/.MainActivity
Subject: Input dispatching timed out (937ec95 com.example.myapplication/com.example.myapplication.MainActivity (server) is not responding. Waited 5002ms for MotionEvent(deviceId=9, source=0x00001002, displayId=0, action=DOWN, actionButton=0x00000000, flags=0x00000000, metaState=0x00000000, buttonState=0x00000000, classification=NONE, edgeFlags=0x00000000, xPrecision=68.3, yPrecision=41.0, xCursorPosition=nan, yCursorPosition=nan, pointers=[0: (53.0, 154.0)]), policyFlags=0x62000000)
Build: google/sdk_gphone_x86_arm/generic_x86_arm:11/RSR1.201013.001/6903271:userdebug/dev-keys

"main" prio=5 tid=1 Native
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x70e9ac28 self=0xe6cc5410
  | sysTid=12020 nice=-10 cgrp=top-app sched=0/0 handle=0xf525b478
  | state=S schedstat=( 879447610 99133049 374 ) utm=36 stm=51 core=3 HZ=100
  | stack=0xff6af000-0xff6b1000 stackSize=8192KB
  | held mutexes=
  native: #00 pc 00000b97  [vdso] (__kernel_vsyscall+7)
  native: #01 pc 000cd46c  /apex/com.android.runtime/lib/bionic/libc.so (__ioctl+28)
  native: #02 pc 00080e6a  /apex/com.android.runtime/lib/bionic/libc.so (ioctl+58)
  native: #03 pc 00050edb  /system/lib/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+331)
  native: #04 pc 000522af  /system/lib/libbinder.so (android::IPCThreadState::waitForResponse(android::Parcel*, int*)+47)
  native: #05 pc 00051fb1  /system/lib/libbinder.so (android::IPCThreadState::transact(int, unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+177)
  native: #06 pc 00048de9  /system/lib/libbinder.so (android::BpBinder::transact(unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+153)
  native: #07 pc 0012302f  /system/lib/libandroid_runtime.so (android_os_BinderProxy_transact(_JNIEnv*, _jobject*, int, _jobject*, _jobject*, int)+143)
  at android.os.BinderProxy.transactNative(Native method)
  at android.os.BinderProxy.transact(BinderProxy.java:540)
  at android.app.IActivityManager$Stub$Proxy.getContentProvider(IActivityManager.java:5698)
  at android.app.ActivityThread.acquireProvider(ActivityThread.java:6813)
  - locked <0x079a8838> (a android.app.ActivityThread$ProviderKey)
  at android.app.ContextImpl$ApplicationContentResolver.acquireProvider(ContextImpl.java:2916)
  at android.content.ContentResolver.acquireProvider(ContentResolver.java:2432)
  at android.content.ContentResolver.insert(ContentResolver.java:2143)
  at android.content.ContentResolver.insert(ContentResolver.java:2111)
  at com.example.myapplication.MainActivity$1.onClick(MainActivity.java:38)
  at android.view.View.performClick(View.java:7448)
  at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:967)
  at android.view.View.performClickInternal(View.java:7425)
  at android.view.View.access$3600(View.java:810)
  at android.view.View$PerformClick.run(View.java:28305)
  at android.os.Handler.handleCallback(Handler.java:938)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:223)
  at android.app.ActivityThread.main(ActivityThread.java:7656)
  at java.lang.reflect.Method.invoke(Native method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

"Binder:604_10" prio=5 tid=122 TimedWaiting
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x14702ba0 self=0xbf630210
  | sysTid=1798 nice=-10 cgrp=foreground sched=0/0 handle=0xb024a1e0
  | state=S schedstat=( 2839200490 1359000443 9706 ) utm=34 stm=249 core=0 HZ=100
  | stack=0xb014f000-0xb0151000 stackSize=1008KB
  | held mutexes=
  at java.lang.Object.wait(Native method)
  - waiting on <0x078f07ba> (a com.android.server.am.ContentProviderRecord)
  at java.lang.Object.wait(Object.java:442)
  at com.android.server.am.ActivityManagerService.getContentProviderImpl(ActivityManagerService.java:7461)
  - locked <0x078f07ba> (a com.android.server.am.ContentProviderRecord)
  at com.android.server.am.ActivityManagerService.getContentProvider(ActivityManagerService.java:7594)
  at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:2381)
  at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:2883)
  at android.os.Binder.execTransactInternal(Binder.java:1154)
  at android.os.Binder.execTransact(Binder.java:1123)

2021-05-31 13:49:02.025 604-1798/system_process E/ActivityManager: Timeout waiting for provider com.example.myapplication/10153 for provider com.example.myapplication providerRunning=false caller=com.example.myapplication/10153
2021-05-31 13:49:02.021 604-655/system_process I/ActivityManager: Killing 12020:com.example.myapplication/u0a153 (adj 0): depends on provider com.example.myapplication/.MyProvider in dying proc com.example.myapplication:hahaha (adj 0)
2021-05-31 13:49:02.022 604-655/system_process I/ActivityManager: Killing 12048:com.example.myapplication:hahaha/u0a153 (adj 0): timeout publishing content providers

=====BlockMonitor=====: mCount--- 3android.os.BinderProxy.transactNative(Native Method)
    android.os.BinderProxy.transact(BinderProxy.java:540)
    android.app.IActivityManager$Stub$Proxy.getContentProvider(IActivityManager.java:5698)
    android.app.ActivityThread.acquireProvider(ActivityThread.java:6813)
    android.app.ContextImpl$ApplicationContentResolver.acquireProvider(ContextImpl.java:2916)
    android.content.ContentResolver.acquireProvider(ContentResolver.java:2432)
    android.content.ContentResolver.insert(ContentResolver.java:2143)
    android.content.ContentResolver.insert(ContentResolver.java:2111)
    com.example.myapplication.MainActivity$1.onClick(MainActivity.java:38)
    android.view.View.performClick(View.java:7448)
    com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:967)
    android.view.View.performClickInternal(View.java:7425)
    android.view.View.access$3600(View.java:810)
    android.view.View$PerformClick.run(View.java:28305)
    android.os.Handler.handleCallback(Handler.java:938)
    android.os.Handler.dispatchMessage(Handler.java:99)
    android.os.Looper.loop(Looper.java:223)
    android.app.ActivityThread.main(ActivityThread.java:7656)
    java.lang.reflect.Method.invoke(Native Method)
    com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
    com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)