App无法在Android gingerbread v2.3.6中启动

Question

我的应用程序在Marshmallow和Lollipop版本中运行良好。但未能在Gingerbread中推出。

这是错误logcat：

  

E / AndroidRuntime（23029）：java.lang.RuntimeException：无法执行   实例化应用程序   com.android.tools.fd.runtime.BootstrapApplication：
  抛出java.lang.ClassNotFoundException：   com.android.tools.fd.runtime.BootstrapApplication在装载机中   dalvik.system.PathClassLoader [/data/app/com.hub.hubcrm-1.apk]
  E / AndroidRuntime（23029）：引起：java.lang.ClassNotFoundException：   com.android.tools.fd.runtime.BootstrapApplication在装载机中   dalvik.system.PathClassLoader [/data/app/com.hub.hubcrm-1.apk]
  W / ActivityManager（295）：强制完成活动
  com.convergehub.convergehubcrm / .MainActivity

这是我的清单

<uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.READ_LOGS" />
    <uses-permission android:name="android.permission.READ_CALL_LOG" />
    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <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"
            android:permission="android.permission.READ_PHONE_STATE"
            android:protectionLevel="dangerous">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".LeadActivity"
            android:label="@string/title_activity_lead"
            android:theme="@style/AppTheme">

        </activity>

    </application> 

这是我的MainActivity oncreate代码：

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Log.d("CHub","Main Activity Started");
        ActionBar actionBar = getSupportActionBar();
        actionBar.hide();

        setContentView(R.layout.activity_main);



        mWebView = (WebView) findViewById(R.id.activity_main_webview);

        if (isNetworkAvailable(this))
        {
            Log.d("CHub","Network Available ");
        }
        else
        {
            Log.d("Hub","Network Unavailable");
            Toast.makeText(getApplicationContext(),"Network unavailable.App will close.",Toast.LENGTH_SHORT).show();
            this.finish();
        }



        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE)!= PackageManager.PERMISSION_GRANTED)
        {

            // Should we show an explanation?
            if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.READ_PHONE_STATE))
            {
                Log.d("CHub","Already permitted");

            }
            else
            {
                Log.d("CHub","Need permission");
                ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_PHONE_STATE},MY_PERMISSIONS_REQUEST_READ_CONTACTS);

            }
        }
        if(MY_PERMISSIONS_REQUEST_READ_CONTACTS==PackageManager.PERMISSION_GRANTED)
        {
            Log.d("CHub","PERMISSION_GRANTED");
            tm = (TelephonyManager) getBaseContext().getSystemService(Context.TELEPHONY_SERVICE);
            tm.listen(callStateListener, PhoneStateListener.LISTEN_CALL_STATE);
        }
        else
        {
            Log.d("CHub","PERMISSION_DENIED");
        }

        WebSettings webSettings = mWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        mWebView.setWebViewClient(new MyAppWebViewClient());

        mWebView.loadUrl("https://xxx.xxxxxxx.com/");

    }

最低SDK版本设置为9，目标SDK版本为23.并且在gradle设置中构建工具版本为23.0.3。

为什么我的应用无法启动Gingerbread版本？