如何在设置Android中禁用应用程序的卸载按钮

Question

如何在设置Android中禁用应用程序的卸载按钮

Arp*_*116 5 android device-admin

我正在实施父母和孩子的应用程序

父母可以追踪自己的孩子
孩子无法卸载该应用程序。

我正在使用设备管理功能来实现此目的。

启用管理员后，我想禁用孩子应用程序中的卸载按钮

图片

这是我的代码。

MainActivity.java

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private PolicyManager policyManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    policyManager = new PolicyManager(this);
}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()) {
        case R.id.activate_admin:
            if (!policyManager.isAdminActive()) {
                Intent activateDeviceAdmin = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
                activateDeviceAdmin.putExtra(DevicePolicyManager.ACTION_SET_NEW_PASSWORD,"abcdefgh");
                activateDeviceAdmin.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, policyManager.getAdminComponent());
                activateDeviceAdmin.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "After activating admin, you will be able to block application uninstallation.");

                startActivityForResult(activateDeviceAdmin,
                        PolicyManager.DPM_ACTIVATION_REQUEST_CODE);

            }
            break;
        case R.id.deactivate_admin:
            if (policyManager.isAdminActive())
                policyManager.disableAdmin();
            break;
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    if (resultCode == this.RESULT_OK && requestCode == PolicyManager.DPM_ACTIVATION_REQUEST_CODE) {
        // handle code for successfull enable of admin
    } else {
        super.onActivityResult(requestCode, resultCode, data);
    }
}
}

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MyReceiver.java

public class SampleDeviceAdminReceiver extends DeviceAdminReceiver {

@Override
public void onDisabled(Context context, Intent intent) {
    // TODO Auto-generated method stub
    Toast.makeText(context, "disabled dpm", Toast.LENGTH_SHORT).show();
    super.onDisabled(context, intent);
}

@Override
public void onEnabled(Context context, Intent intent) {
    // TODO Auto-generated method stub
    Toast.makeText(context, "enabled dpm", Toast.LENGTH_SHORT).show();
    super.onEnabled(context, intent);
}

@Override
public CharSequence onDisableRequested(Context context, Intent intent) {
    // TODO Auto-generated method stub
    Toast.makeText(context, "disable dpm request", Toast.LENGTH_SHORT).show();
    return super.onDisableRequested(context, intent);
}



}

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PolicyManager.java

public class PolicyManager {

public static final int DPM_ACTIVATION_REQUEST_CODE = 100;

private Context mContext;
private DevicePolicyManager mDPM;
private ComponentName adminComponent;

public PolicyManager(Context context) {
    // TODO Auto-generated constructor stub
    this.mContext = context;
    mDPM = (DevicePolicyManager) mContext
            .getSystemService(Context.DEVICE_POLICY_SERVICE);
    adminComponent = new ComponentName(mContext.getPackageName(),
            mContext.getPackageName() + ".SampleDeviceAdminReceiver");
}

public boolean isAdminActive() {
    return mDPM.isAdminActive(adminComponent);
}

public ComponentName getAdminComponent() {
    return adminComponent;
}

public void disableAdmin() {
    mDPM.removeActiveAdmin(adminComponent);
}
}

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Answer 1

Vis*_*hah 6

我也想在我的应用程序上实现相同的功能。

我已成功启用该权限。

问题是您必须向触发名为“DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN”的特定意图的用户请求此权限。

我在演示应用程序中实现了相同的功能。

逐步添加功能以使其代码适用。

我的应用程序是用Kotlin开发的，如果您想将此代码转换为java，那么您可以使用以下链接
1从Android Studio转换
2 Online Converter

步骤1

在 res/xml 文件夹中创建 XML 文件
文件名 - my_admin.xml（您可以根据需要修改名称）

my_admin.xml

<device-admin xmlns:android="http://schemas.android.com/apk/res/android" >
    <uses-policies>
        <limit-password />
        <watch-login />
        <reset-password />
        <force-lock />
        <wipe-data />
    </uses-policies>
</device-admin>

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确保只添加需要的权限，添加不必要的权限将导致用户无法激活管理员权限。

第2步

您必须创建一个扩展到DeviceAdminReceiver的类
就我而言，我将该文件命名为 DeviceAdminDemo

DeviceAdminDemo.kt

 class DeviceAdminDemo : DeviceAdminReceiver() {

 override fun onReceive(context: Context, intent: Intent) {
    super.onReceive(context, intent)
 }

 override fun onEnabled(context: Context, intent: Intent) {
    super.onEnabled(context, intent)
 }

 override fun onDisabled(context: Context, intent: Intent) {
    super.onDisabled(context, intent)
 }
}

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本课程将收到用户的反馈

步骤3

同样编辑您的清单文件

Android清单

<?xml version="1.0" encoding="utf-8"?>
   <manifest 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.DeviceAdminDemo"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

            <meta-data
                android:name="android.app.lib_name"
                android:value="" />
        </activity>

        <receiver
            android:name=".DeviceAdminDemo"
            android:description="@string/device_description"
            android:exported="true"
            android:label="@string/device_admin_label"
            android:permission="android.permission.BIND_DEVICE_ADMIN" >
            <meta-data
                android:name="android.app.device_admin"
                android:resource="@xml/my_admin" />

            <intent-filter>
                <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
            </intent-filter>
        </receiver>

    </application>

</manifest>

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步骤4

现在这是我的 MainActivity 的代码，我在其中触发了 Intent

MainActivity.kt

class MainActivity : AppCompatActivity() {

lateinit var mDPM: DevicePolicyManager
lateinit var mAdminName: ComponentName

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    val resultLauncher =
        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
            if (result.resultCode == Activity.RESULT_OK) {
                val data: Intent? = result.data
            }
        }

    try {
        mDPM = getSystemService(DEVICE_POLICY_SERVICE) as DevicePolicyManager
        mAdminName = ComponentName(this, DeviceAdminDemo::class.java)
        if (!mDPM.isAdminActive(mAdminName)) {

            val intent = Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN)
            intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mAdminName)
            intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "Click on Activate button to secure your application.")
            resultLauncher.launch(intent)

        } else {
            mDPM.lockNow()
        }
    } catch (e: Exception) {
        e.printStackTrace()
    }
}
}

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