[英]How to Lock/Unlock screen programmatically?
我正在做一个在抖动时锁定屏幕的应用程序。 现在它正在锁定,如果屏幕关闭,它就会从那里转到广播接收器,它进入必须打开屏幕的服务。
下面是广播接收器:
public class ScreenReceiver extends BroadcastReceiver {
public static boolean wasScreenOn = true;
@Override
public void onReceive(Context context, Intent intent) {
System.out.println("Entered Broadcaste Reciever");
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
// DO WHATEVER YOU NEED TO DO HERE
System.out.println("SCREEN_OFF"+wasScreenOn);
wasScreenOn = false;
Intent i = new Intent(context, UpdateService.class);
i.putExtra("screen_state", wasScreenOn);
context.startService(i);
System.out.println("jrkejhr keh");
}
else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
// AND DO WHATEVER YOU NEED TO DO HERE
wasScreenOn = true;
System.out.println("SCREEN_ON"+wasScreenOn);
}
}
它进入我写回家的意图行动的服务是......
ShakeListener mShaker;
int amountOfTime = 0;
Context context1;
@Override
public void onCreate() {
super.onCreate();
// REGISTER RECEIVER THAT HANDLES SCREEN ON AND SCREEN OFF LOGIC
System.out.println("Enterd Service");
final Vibrator vibe = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
mShaker = new ShakeListener(this);
mShaker.setOnShakeListener(new ShakeListener.OnShakeListener () {
public void onShake() {
vibe.vibrate(100);
Intent goHome = new Intent();
goHome.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
goHome.setAction("android.intent.action.MAIN");
goHome.addCategory("android.intent.category.HOME");
startActivity(goHome);
}
});
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
它正在进入服务。 但是主屏幕没有显示。 当服务被调用时,屏幕被锁定。
编辑:
由于有些人需要在以编程方式锁定后解锁设备方面的帮助,我通过了以编程方式锁定/解锁Android屏幕后的帖子,请查看,可能对您有所帮助。
原答案是:
您需要获得管理员权限才能锁定手机屏幕
请查看下面的简单教程以实现这一目标
这里也是代码示例..
锁屏活动.java
public class LockScreenActivity extends Activity implements OnClickListener {
private Button lock;
private Button disable;
private Button enable;
static final int RESULT_ENABLE = 1;
DevicePolicyManager deviceManger;
ActivityManager activityManager;
ComponentName compName;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
deviceManger = (DevicePolicyManager)getSystemService(
Context.DEVICE_POLICY_SERVICE);
activityManager = (ActivityManager)getSystemService(
Context.ACTIVITY_SERVICE);
compName = new ComponentName(this, MyAdmin.class);
setContentView(R.layout.main);
lock =(Button)findViewById(R.id.lock);
lock.setOnClickListener(this);
disable = (Button)findViewById(R.id.btnDisable);
enable =(Button)findViewById(R.id.btnEnable);
disable.setOnClickListener(this);
enable.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if(v == lock){
boolean active = deviceManger.isAdminActive(compName);
if (active) {
deviceManger.lockNow();
}
}
if(v == enable){
Intent intent = new Intent(DevicePolicyManager
.ACTION_ADD_DEVICE_ADMIN);
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,
compName);
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,
"Additional text explaining why this needs to be added.");
startActivityForResult(intent, RESULT_ENABLE);
}
if(v == disable){
deviceManger.removeActiveAdmin(compName);
updateButtonStates();
}
}
private void updateButtonStates() {
boolean active = deviceManger.isAdminActive(compName);
if (active) {
enable.setEnabled(false);
disable.setEnabled(true);
} else {
enable.setEnabled(true);
disable.setEnabled(false);
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case RESULT_ENABLE:
if (resultCode == Activity.RESULT_OK) {
Log.i("DeviceAdminSample", "Admin enabled!");
} else {
Log.i("DeviceAdminSample", "Admin enable FAILED!");
}
return;
}
super.onActivityResult(requestCode, resultCode, data);
}
}
我的管理程序
public class MyAdmin extends DeviceAdminReceiver{
static SharedPreferences getSamplePreferences(Context context) {
return context.getSharedPreferences(
DeviceAdminReceiver.class.getName(), 0);
}
static String PREF_PASSWORD_QUALITY = "password_quality";
static String PREF_PASSWORD_LENGTH = "password_length";
static String PREF_MAX_FAILED_PW = "max_failed_pw";
void showToast(Context context, CharSequence msg) {
Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
}
@Override
public void onEnabled(Context context, Intent intent) {
showToast(context, "Sample Device Admin: enabled");
}
@Override
public CharSequence onDisableRequested(Context context, Intent intent) {
return "This is an optional message to warn the user about disabling.";
}
@Override
public void onDisabled(Context context, Intent intent) {
showToast(context, "Sample Device Admin: disabled");
}
@Override
public void onPasswordChanged(Context context, Intent intent) {
showToast(context, "Sample Device Admin: pw changed");
}
@Override
public void onPasswordFailed(Context context, Intent intent) {
showToast(context, "Sample Device Admin: pw failed");
}
@Override
public void onPasswordSucceeded(Context context, Intent intent) {
showToast(context, "Sample Device Admin: pw succeeded");
}
}
使用Activity.getWindow()
获取您的活动窗口; 使用Window.addFlags()
在WindowManager.LayoutParams
中添加您想要的以下任一标志:
示例页面上的 androidmanifest.xml 和 policies.xml 文件在我的浏览器中不可见,因为它试图将 XML 文件格式化为 HTML。 我只是为了方便他人而发布此内容以供参考,此内容来自示例页面。
感谢大家提出这个有用的问题!
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.kns"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".LockScreenActivity"
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=".MyAdmin"
android:permission="android.permission.BIND_DEVICE_ADMIN">
<meta-data android:name="android.app.device_admin"
android:resource="@xml/policies" />
<intent-filter>
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</receiver>
</application>
</manifest>
政策文件
<?xml version="1.0" encoding="utf-8"?>
<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>
访问 android 开发者链接并从示例应用程序中读取锁定
https://developer.android.com/guide/topics/admin/device-admin
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