Android 权限系统

• 示例

xml
 <WebView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/wv"></WebView>

MainActivity
        wv = (WebView) findViewById(R.id.wv);
        wv.loadUrl("http://www.baidu.com");

AndroidManifest配置权限
<uses-permission android:name="android.permission.INJECT"/>

• 在代码中检查权限

AndroidManifest声明权限
 <permission android:name="android.permission.sw.cins.com.servic.permission.SAY_HRLLO"/>

public class Hello {
    public static final String PERMISSION_SAY_HELLO = "sw.cins.com.servic.permission.SAY_HRLLO";
    public  static void sayHello(Context context){
        //权限检查
        int checkResult = context.checkCallingOrSelfPermission(PERMISSION_SAY_HELLO);
        if(checkResult != PackageManager.PERMISSION_GRANTED){
            throw new SecurityException("执行sayHello需要权限");
        }
    }
}

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //执行
        Hello.sayHello(this);

    }

• 为组件添加权限检查
  权限声明后，需要在在对应的activity中添加权限