大约有 5,000 项符合查询结果（耗时：0.0210秒） [XML]
Is there a method that works like start fragment for result?
...imply share the same ViewModel between fragments
SharedViewModel
import android.arch.lifecycle.MutableLiveData
import android.arch.lifecycle.ViewModel
class SharedViewModel : ViewModel() {
val stringData: MutableLiveData<String> by lazy {
MutableLiveData<String>()
}
...
How to prevent the activity from loading twice on pressing the button
...
Add this to your Activity definition in AndroidManifest.xml...
android:launchMode = "singleTop"
For example:
<activity
android:name=".MainActivity"
android:theme="@style/AppTheme.NoActionBar"
android:launchMode = "singleTo...
MVC pattern on Android
...it possible to implement the model–view–controller pattern in Java for Android?
21 Answers
...
Android - How To Override the “Back” button so it doesn't Finish() my Activity?
...at startForeground() and make sure to have an ongoing notification or else Android will kill your service if it needs to free memory.
@Override
public void onBackPressed() {
Log.d("CDA", "onBackPressed Called");
Intent setIntent = new Intent(Intent.ACTION_MAIN);
setIntent.addCategory(Inten...
How to have Android Service communicate with Activity
I'm writing my first Android application and trying to get my head around communication between services and activities. I have a Service that will run in the background and do some gps and time based logging. I will have an Activity that will be used to start and stop the Service.
...
使用Activity启动器组件 · App Inventor 2 中文网
...他 App Inventor 应用程序
从 App Inventor 应用程序启动内置 Android 应用程序
启动相机
启动网络搜索
使用预先指定的消息启动邮件程序
显示某个位置的地图
播放在线视频
选择联系人
启动其他...
how to get an uri of an image resource in android
...
The format is:
"android.resource://[package]/[res id]"
[package] is your package name
[res id] is value of the resource ID, e.g. R.drawable.sample_1
to stitch it together, use
Uri path = Uri.parse("android.resource://your.package.name/"...
Difference between ActionBarSherlock and ActionBar Compatibility
...ck gives your application an action bar regardless* of what version of the android API your app is being run on. Action Bar Compatibility gives you the action bar only if the device that you're running on is API level 3.0 or above.
*Note that if the device you're running on isn't 3.0 or above, Acti...
Switching between Android Navigation Drawer image and Up caret when using fragments
When using the Navigation Drawer the Android devs are recommending that in the ActionBar "only those screens that are represented in the Navigation Drawer should actually have the Navigation Drawer image" and that "all other screens have the traditional up carat."
...
Dilemma: when to use Fragments vs Activities:
...dispersed. So one box with parts inside.
Take care not to misuse the box. Android UX experts advise (you can find them on YouTube) when we should explicitly load another Activity, instead to use a Fragment (like when we deal with the Navigation Drawer which has categories). Once you feel comfortabl...