当按下后退按钮时,我需要将布尔值传递给intent,然后再返回intent.目标是设置布尔值并使用条件来防止在检测到onShake事件时多次启动新意图.我会使用SharedPreferences,但似乎它与我的onClick代码不相配,我不知道如何解决这个问题.任何建议,将不胜感激!
public class MyApp extends Activity {
private SensorManager mSensorManager;
private ShakeEventListener mSensorListener;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mSensorListener = new ShakeEventListener();
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensorManager.registerListener(mSensorListener,
mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_UI);
mSensorListener.setOnShakeListener(new ShakeEventListener.OnShakeListener() {
public void onShake() {
// This code is launched multiple times on a vigorous
// shake of the device. I need to prevent this.
Intent myIntent = new Intent(MyApp.this, NextActivity.class);
MyApp.this.startActivity(myIntent);
}
});
}
@Override
protected …我正在尝试从onClickListener启动AlertDialog但是我收到以下错误.
The constructor AlertDialog.Builder(new View.OnClickListener(){}) is undefined
有谁知道如何解决这一问题？
mRecordButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new AlertDialog.Builder( this )
.setTitle( "Cast Recording" )
.setMessage( "Now recording your message" )
.setPositiveButton( "Save", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Log.d( "AlertDialog", "Positive" );
}
})
.setNegativeButton( "Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Log.d( "AlertDialog", "Negative" );
}
} )
.show();
}
});
我一直在尝试从ASyncTask成功上传通知,以便全天工作.我没有从我当前的代码中收到任何错误,但我无法通知通知栏(或其他任何地方).我在LogCat中没有收到任何消息,并且通知栏中没有显示任何通知.这是我的代码:
Notification mNotification = new Notification(icon, tickerText, when);
CharSequence contentTitle = "upload completed.";
CharSequence contentText = "upload completed.";
Intent notificationIntent = new Intent(context, CastrActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_NO_CREATE);
mNotification.contentIntent = contentIntent;
mNotification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
mNotificationManager.notify(NOTIFICATION_ID, mNotification);
这是从ASyncTask的onPostExecute()方法调用的.老实说,我对PendingIntent部分感到有点困惑.任何澄清我怀疑是不正确的代码将非常感激.