Android版升级到31，Unity闪屏之后卡死

        当前海外版本有硬性要求：Target API level必须升级到31，升级之后在Android 12机型上启动游戏，Unity闪屏之后卡死，其他Android版本正常。

        查了一下这个问题，是因为TelephonyManager的listen函数在Android 12过期了，如果没有授权READ_PHONE_STATE权限，此函数会抛出一个SecurityException。

        而Unity在启用了自带的音频系统的情况下，恰巧在启动时机会去调用这个方法以实现“在用户接电话时游戏静音”的功能，抛出的异常影响了后续的流程导致卡死。

如果项目不能升级引擎，也有一个解决办法：

        重新写一个android的启动类， 将这个问题绕过去

package com.xx.xxx
import android.content.Context;
import android.os.Build;
import com.unity3d.player.UnityPlayer;

public class UnityPlayerNew  extends UnityPlayer
{
    public UnityPlayerNew(Context context) 
    {
        super(context);
    }

    @Override
    protected void addPhoneCallListener()
    {
        if (Build.VERSION.SDK_INT >= 31)
        {
            return;
        }
        super.addPhoneCallListener();
    }
}

package com.xx.xxx;

import com.unity3d.player.*;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

public class UnityPlayerActivity extends Activity
{
    protected UnityPlayer mUnityPlayer; // don't change the name of this variable; referenced from native code


    protected String updateUnityCommandLineArguments(String cmdLine)
    {
        return cmdLine;
    }

    // Setup activity layout
    @Override protected void onCreate(Bundle savedInstanceState)
    {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);

        String cmdLine = updateUnityCommandLineArguments(getIntent().getStringExtra("unity"));
        getIntent().putExtra("unity", cmdLine);

        mUnityPlayer = new UnityPlayerNew(this);

        setContentView(mUnityPlayer);
        mUnityPlayer.requestFocus();
    }

    @Override protected void onNewIntent(Intent intent)
    {
        // To support deep linking, we need to make sure that the client can get access to
        // the last sent intent. The clients access this through a JNI api that allows them
        // to get the intent set on launch. To update that after launch we have to manually
        // replace the intent with the one caught here.
        setIntent(intent);
    }

    // Quit Unity
    @Override protected void onDestroy ()
    {
        mUnityPlayer.destroy();
        super.onDestroy();
    }

    // Pause Unity
    @Override protected void onPause()
    {
        super.onPause();
        mUnityPlayer.pause();
    }

    // Resume Unity
    @Override protected void onResume()
    {
        super.onResume();
        mUnityPlayer.resume();
    }

    @Override protected void onStart()
    {
        super.onStart();
        mUnityPlayer.start();
    }

    @Override protected void onStop()
    {
        super.onStop();
        mUnityPlayer.stop();
    }

    // Low Memory Unity
    @Override public void onLowMemory()
    {
        super.onLowMemory();
        mUnityPlayer.lowMemory();
    }

    // Trim Memory Unity
    @Override public void onTrimMemory(int level)
    {
        super.onTrimMemory(level);
        if (level == TRIM_MEMORY_RUNNING_CRITICAL)
        {
            mUnityPlayer.lowMemory();
        }
    }

    // This ensures the layout will be correct.
    @Override public void onConfigurationChanged(Configuration newConfig)
    {
        super.onConfigurationChanged(newConfig);
        mUnityPlayer.configurationChanged(newConfig);
    }

    // Notify Unity of the focus change.
    @Override public void onWindowFocusChanged(boolean hasFocus)
    {
        super.onWindowFocusChanged(hasFocus);
        mUnityPlayer.windowFocusChanged(hasFocus);
    }

    // For some reason the multiple keyevent type is not supported by the ndk.
// Force event injection by overriding dispatchKeyEvent().
@Override public boolean dispatchKeyEvent(KeyEvent event)
{
if (event.getAction() == KeyEvent.ACTION_MULTIPLE)
return mUnityPlayer.injectEvent(event);
return super.dispatchKeyEvent(event);
}

// Pass any events not handled by (unfocused) views straight to UnityPlayer
@Override public boolean onKeyUp(int keyCode, KeyEvent event)     { return mUnityPlayer.injectEvent(event); }
@Override public boolean onKeyDown(int keyCode, KeyEvent event)   { return mUnityPlayer.injectEvent(event); }
@Override public boolean onTouchEvent(MotionEvent event)          { return mUnityPlayer.injectEvent(event); }
/*API12*/ public boolean onGenericMotionEvent(MotionEvent event)  { return mUnityPlayer.injectEvent(event); }
}

<activity android:name="com.xx.xxx.UnityPlayerActivity" android:screenOrientation="landscape" android:exported="true" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
  <intent-filter>
    <action android:name="android.intent.action.MAIN" />
    <category android:name="android.intent.category.LAUNCHER" />
    <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
  </intent-filter>
</activity>