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微数据库 · App Inventor 2 中文网
App教程 帮助 应用介绍
数据存储一般分为两大类：本地 和 网络，本地一般是数据文件的形式存储在手机上，本地App每次启动都可以共享读取，但是不同的手机之间不可以共享数据；如果需要多个手...
实时开发、测试和调试工具 · App Inventor 2 中文网
...击某个块，然后从弹出菜单中选择禁用块，将阻止该块在打包时成为应用程序的一部分。 选择启用块可恢复禁用的块。
折叠代码块
如果你的应用程序有很多块，它们将无法同时全部显示在屏幕上。 你需要滚动“块编辑器”窗...
Android Studio Project Structure (v.s. Eclipse Project Structure)
...nd ties them into a greater whole.
For Android, it means one project per app, and one module per library and per test app.
There are multiple issues if you try to build multiple apps within the same project. It's possible, but if you try (like I did), you will see that almost everything is design...
Android ViewPager with bottom dots
...out
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_w...
Using Build Flavors - Structuring source folders and build.gradle correctly
... version of main/java. When I don't put MainActivity inside main/java, the app crashes when I start it.
– JensJensen
May 5 '14 at 11:22
...
How to Create a circular progressbar in Android which rotates on it?
...mProgressBarActivity.java:
public class CustomProgressBarActivity extends AppCompatActivity {
private TextView txtProgress;
private ProgressBar progressBar;
private int pStatus = 0;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInst...
Best practice for storing and protecting private API keys in applications [closed]
Most app developers will integrate some third party libraries into their apps. If it's to access a service, such as Dropbox or YouTube, or for logging crashes. The number of third party libraries and services is staggering. Most of those libraries and services are integrated by somehow authenticatin...
frequent issues arising in android view, Error parsing XML: unbound prefix
...
A couple of reasons that this can happen:
1) You see this error with an incorrect namespace, or a typo in the attribute. Like 'xmlns' is wrong, it should be xmlns:android
2) First node needs to contain:
xmlns:android="http://schemas.android.com/apk/res/andro...
How to obtain Signing certificate fingerprint (SHA1) for OAuth 2.0 on Android?
I'm trying to register my android app following the steps in https://developers.google.com/console/help/#installed_applications which leads me to follow
http://developer.android.com/tools/publishing/app-signing.html .
...
Android error: Failed to install *.apk on device *: timeout
...me and don't know what causing this:
When trying to run/debug an Android app on a real device (Galaxy Samsung S in my case) I'm getting the following error in the Console:
...