Android修改、设置锁屏密码
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在实现锁屏功能的时候首先要获得管理员权限,然后通过用户授权,用户如果同意授权,则就可以修改或设置锁屏密码。
具体方法如下:
1,首先要新建一个DeviceAdminReceiver的子类
import android.app.admin.DeviceAdminReceiver;public class AdminManageReceiver extends DeviceAdminReceiver {}
2,在清单文件对接收者进行配置
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.njupt.testrotate1" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="8" /> <uses-permission android:name="android.permission.VIBRATE"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.njupt.testrotate1.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <receiver android:name="com.njupt.testrotate1.MyAdmin" > <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>
3,由于清单文件中用到了my_admin.xml,所以在在res目录下新建xml/my_admin.xml,内容如下:
<?xml version="1.0" encoding="utf-8"?> <device-admin xmlns:android="http://schemas.android.com/apk/res/android"> <!-- limit-password 设置密码的规则 watch-login 监控屏幕解锁尝试次数 reset-password 更改屏幕解锁密码 force-lock 设备自动锁屏 wipe-data 删除全部的数据 --> <uses-policies> <limit-password/> <watch-login /> <reset-password /> <force-lock /> <wipe-data /> </uses-policies> </device-admin>
然后在mainActivity中:
private DevicePolicyManager devicePolicyManager; private boolean isAdminActive; devicePolicyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE); // 申请权限 ComponentName componentName = new ComponentName(this, MyAdmin.class); // 判断该组件是否有系统管理员的权限 isAdminActive = devicePolicyManager .isAdminActive(componentName); if(!isAdminActive){//这一句一定要有... Intent intent = new Intent(); //指定动作 intent.setAction(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN); //指定给那个组件授权 intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName); startActivity(intent); } if(isAdminActive){ Toast.makeText(this, "具有权限,将进行锁屏....", 1).show(); devicePolicyManager.lockNow(); devicePolicyManager.resetPassword("123321", 0); }
MainAcitivity的完整代码如下所示:
import android.os.Bundle; import android.os.Vibrator; import android.app.Activity; import android.app.Service; import android.app.admin.DevicePolicyManager; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity implements SensorEventListener { private Button clear; private TextView tv1; private SensorManager mSensorManager; private Vibrator vibrator; private int counter = 1; private DevicePolicyManager devicePolicyManager; private boolean isAdminActive; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE); vibrator = (Vibrator) getSystemService(Service.VIBRATOR_SERVICE); // clear = (Button) findViewById(R.id.clear); // clear.setOnClickListener(new Button.OnClickListener() { // // @Override // public void onClick(View v) { // clear.setText("现在给button赋值喽...."); // } // }); // tv1 = (TextView) findViewById(R.id.tv1); devicePolicyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE); // 申请权限 ComponentName componentName = new ComponentName(this, MyAdmin.class); // 判断该组件是否有系统管理员的权限 isAdminActive = devicePolicyManager .isAdminActive(componentName); if(!isAdminActive){ Intent intent = new Intent(); //指定动作 intent.setAction(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN); //指定给那个组件授权 intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName); startActivity(intent); } } @Override protected void onResume() { super.onResume(); mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_GAME); } @Override protected void onStop() { mSensorManager.unregisterListener(this); super.onStop(); } @Override protected void onPause() { mSensorManager.unregisterListener(this); super.onPause(); } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { } @Override public void onSensorChanged(SensorEvent event) { int sensorType = event.sensor.getType(); float[] values = event.values; float x = values[0]; float y = values[1]; if (sensorType == Sensor.TYPE_ACCELEROMETER) { tv1.setText("现在的x轴是: " + x + " y轴是: " + y); if (Math.abs(x) > 9.0 || Math.abs(y) > 9.0) { // Toast.makeText(this, "现在的垂直方向已经超过了90度,将进行锁屏", 1).show(); vibrator.vibrate(500); System.out.println("...............isAdminActive: " + isAdminActive); if(isAdminActive){ Toast.makeText(this, "具有权限,将进行锁屏....", 1).show(); devicePolicyManager.lockNow(); devicePolicyManager.resetPassword("123321", 0); } } } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } }
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