Question

几个小时前，我学会了用不同级别（正常，签名，危险）定义自己的自定义权限。然后，我跟随android documentation并用Yury回答的question's进行了实际测试。首先，我设置了权限级别normal，然后在第一个活动中单击按钮之后，便可以访问第二个活动。但是，当我将其设置为dangerous时，我无法访问第二个活动。我有每次Security exception - permission denial。然后，我转到应用程序设置中的“权限”部分，看到我的custom permission已关闭。我打开它，然后可以访问该活动。
但是我的问题是，如何像Android系统定义的其他危险权限一样请求此权限，并显示对话框并授予它，而无需转到应用程序设置中的权限部分。我知道如何使用-

访问权限

if (ContextCompat.checkSelfPermission(thisActivity,
        Manifest.permission.READ_CONTACTS)
        != PackageManager.PERMISSION_GRANTED) {

    // Permission is not granted
    // Should we show an explanation?
    if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
            Manifest.permission.READ_CONTACTS)) {
        // Show an explanation to the user *asynchronously* -- don't block
        // this thread waiting for the user's response! After the user
        // sees the explanation, try again to request the permission.
    } else {
        // No explanation needed; request the permission
        ActivityCompat.requestPermissions(thisActivity,
                new String[]{Manifest.permission.READ_CONTACTS},
                MY_PERMISSIONS_REQUEST_READ_CONTACTS);

        // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
        // app-defined int constant. The callback method gets the
        // result of the request.
    }
} else {
    // Permission has already been granted
}

但是问题是android的默认权限是在Manifest.permission.READ_CONTACTS中定义的，但是我如何用它定义自定义权限。我的代码如下。
PermissionTestServerActivity（第一个活动）：-

public class PermissionTestServerActivity extends Activity {
    private static final String TAG = "PermissionTestServerActivity";

    /** Called when the activity is first created. */
    Button btnTest;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        btnTest = (Button) findViewById(R.id.btnTest);
        btnTest.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Log.d(TAG, "Button pressed!");
                Intent in = new Intent();
                in.setAction("com.testpackage.permissiontestclient.MyAction");
                in.addCategory("android.intent.category.DEFAULT");
                startActivity(in);
            }
        });
    }
}

及其清单：-

<?xml version="1.0" encoding="utf-8"?>
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="com.testpackage.mypermission"/>

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
        android:name=".PermissionTestServerActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

PermissionTestClient的清单（第二个活动）：-

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.testpackage.permissiontestclient"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />
    <permission android:name="com.testpackage.mypermission" android:label="my_permission" android:protectionLevel="dangerous"></permission>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:permission="com.testpackage.mypermission"
            android:name=".PermissionTestClientActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

            <intent-filter >
                <action android:name="com.testpackage.permissiontestclient.MyAction" />
                <category android:name="android.intent.category.DEFAULT" />                
            </intent-filter>
        </activity>
    </application>

</manifest>

请求自定义权限的权限

0 个答案: