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How to make an alert dialog fill 90% of screen size?
...can create and display a custom alert dialog just fine but even so I have android:layout_width/height="fill_parent" in the dialog xml it is only as big as the contents.
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Detect application heap size in Android
...w do you programmatically detect the application heap size available to an Android app?
9 Answers
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How to list files in an android directory?
..., the permissions must be given in the manifest file.
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Try this:
String path = Environment.getExternalStorageDirectory().toString()+"/Pictures";
Log.d("Files", "Path: " + path);
File directory = new File(path);
File...
Android update activity UI from service
...le - this is particularly important to me as I am now sharing code between Android and iOS (using RoboVM)
RxJava provides canned (and cross-platform) scheduling, and easy composition of sequential asynchronous operations.
This should be more efficient than using a LocalBroadcast, though the overhead...
Android 4.3 Bluetooth Low Energy unstable
...sting on the Nexus 4). After getting started with the official BLE APIs in Android 4.3, I have noticed that after I connect a device for the first time I am rarely able to successfully connect to / communicate with that device or any other device again.
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Get context of test project in Android junit test case
Does anyone know how can you get the context of the Test project in Android junit test case (extends AndroidTestCase).
9...
How can I get zoom functionality for images?
...se it is a custom view. Example:
<com.example.touch.TouchImageView
android:id="@+id/img”
android:layout_width="match_parent"
android:layout_height="match_parent" />
Note: I've removed my prior answer, which included some very old code and now link straight to the most updated ...
Android OnClickListener - identify a button
...ou can try the same but without listeners. On your button XML definition:
android:onClick="ButtonOnClick"
And in your code define the method ButtonOnClick:
public void ButtonOnClick(View v) {
switch (v.getId()) {
case R.id.button1:
doSomething1();
break;
case R.id...
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...
Unable to resolve host “” No address associated with hostname
... give your app the permission to use the internet. Try adding this to your android manifest:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
...