在android中以編程方式鎖定設備鎖

Question

當我點擊按鈕時，必須鎖定模擬器。我用這個代碼 -

我不明白什麼是主動和securemeAdmin

我使用這個鏈接 - >Lock the android device programmatically

public class adminActivity extends DeviceAdminReceiver 
{ 
    public static class Test extends Activity 
    { 
     Button btn; 
     DevicePolicyManager mDPM; 
     ComponentName mDeviceAdminSample; 

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

    mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE); 
     mDeviceAdminSample = new ComponentName(Test.this, 
       adminActivity.class); 

     Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN); 
     intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, securemeAdmin); 

     btn=(Button)findViewById(R.id.btn); 

     btn.setOnClickListener(new OnClickListener() 
     { 
     @Override 
     public void onClick(View v) 
     { 
      if (active) 
      { 
      mDPM.lockNow(); 
      } 
     } 
     }); 
     } 
    } 
} 

我也用鍵盤鎖管理器，但它也不能正常工作。有人可以給我鎖電話的例子嗎？

public class Keyguard extends Activity 
{ 
    Button btn; 
    KeyguardLock lock; 
    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     btn=(Button)findViewById(R.id.btn); 

     KeyguardManager mgr = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE); 
     lock = mgr.newKeyguardLock(KEYGUARD_SERVICE); 

     btn.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View v) 
     { 
      lock.reenableKeyguard(); 


     } 
    }); 
    } 
} 

任何人都可以幫助我。

Answer 1

該代碼會爲你工作..

WindowManager.LayoutParams lp = getWindow().getAttributes(); 
lp.screenBrightness = 0; 
getWindow().setAttributes(lp); 
getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD); 

Answer 2

對於鎖定的Android設備必須需要管理員的權利。您必須處理三件事1）DeviceAdminReceiver類2）清單文件3）您調用DevicePolicyManager的鎖定方法的Activity類。請參閱此鏈接http://developer.android.com/guide/topics/admin/device-admin.html