startActivity（）在BroadcastReceiverclass中不起作用

Question

我的代码是：

Intent lockintent = new Intent();         
lockintent.setClassName("com.example.lalitha.s1",
                         "com.example.lalitha.s1.WipeActivity");
context.startActivity(lockintent);
mDPM = DevicePolicyManager)context.getSystemService(                                      Context.DEVICE_POLICY_SERVICE);
mDeviceAdmin = new ComponentName(context, DeviceAdminSample .class);
boolean active = mDPM.isAdminActive(mDeviceAdmin);
   if (active) {
        mDPM.lockNow();
    }
   else{
       Toast.makeText(context, "not locked", Toast.LENGTH_LONG).show();
   }

context.startActivity未执行 如果我省略那么它的显示设备＆＃34;没有锁定＆＃34;

Answer 1

替换此位：

Intent lockintent = new Intent();         
lockintent.setClassName("com.example.lalitha.s1",
                     "com.example.lalitha.s1.WipeActivity");

与

Intent lockintent = new Intent(context, WipeActivity.class);
lockintent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

但请记住，Toast消息仍将显示。