Android 日常开发问题总结1

1，Android SDK Manager无法更新，强制使用http下载

2，Android 4.1.2 系统动画结束关闭popuwindow 报错，如下：

03-20 11:31:59.207: E/AndroidRuntime(20030): FATAL EXCEPTION: main
03-20 11:31:59.207: E/AndroidRuntime(20030): java.lang.NullPointerException
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.ViewRootImpl.drawAccessibilityFocusedDrawableIfNeeded(ViewRootImpl.java:2311)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.ViewRootImpl.onHardwarePostDraw(ViewRootImpl.java:1941)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1206)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.ViewRootImpl.draw(ViewRootImpl.java:2157)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2029)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1840)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4223)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.Choreographer.doCallbacks(Choreographer.java:555)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.Choreographer.doFrame(Choreographer.java:525)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.os.Handler.handleCallback(Handler.java:615)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.os.Handler.dispatchMessage(Handler.java:92)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.os.Looper.loop(Looper.java:213)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at android.app.ActivityThread.main(ActivityThread.java:4786)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at java.lang.reflect.Method.invokeNative(Native Method)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at java.lang.reflect.Method.invoke(Method.java:511)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
03-20 11:31:59.207: E/AndroidRuntime(20030): 	at dalvik.system.NativeStart.main(Native Method)

解决办法：在动画结束时调用handler来dismiss popupwindow 。

animation.setAnimationListener(new AnimationListener() {
    public void onAnimationEnd(final Animation animation) {
        // The animation has ended
        new Handler().post(new Runnable() {
            @Override
            public void run() {
                popupWindow.dismiss();
            }
        });
    }
    public void onAnimationRepeat(final Animation animation) {}
    public void onAnimationStart(final Animation animation) {}
});

3，　如何在模拟器中安装apk，在命令行cmd窗口中进入Android sdk所在目录的platform-tools目录下输入adb install apkname.apk,回车，apkname.apk可以是apk所在路径，如E:\app\name.apk