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Android Permission 

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.z.steven.xchat">
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <application ...



申请权限:


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


        


                ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_PHONE_STATE},CONTEXT_INCLUDE_CODE);
        }
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