android

全屏去状态栏 

Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

/设置为无标题栏 

requestWindowFeature(Window.FEATURE_NO_TITLE);

  

//设置为全屏模式 

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

流的处理 

InputStream is = getResources().openRawResource(R.drawable.icon);
        //decode
 Bitmap mBitmap = BitmapFactory.decodeStream(is);

获取屏幕的宽和高 

int screenWidth;
int screenHeight;

WindowManager windowManager = getWindowManager();

Display display = windowManager.getDefaultDisplay();
screenWidth = display.getWidth();
screenHeight = display.getHeight();

固定横竖屏 
在AndroidManifest.xml里面配置一下就可以了。加入这一行android:screenOrientation="landscape"。 
例如（landscape是横向，portrait是纵向）： 

<activity android:name=".GamePlay"
                android:screenOrientation="portrait"></activity>

Android View添加 Listener 小技巧示例 
http://rayleung.iteye.com/blog/539190 

动画 

Animation rotateAnimation =
        AnimationUtils.loadAnimation(this, R.anim.rotate1);

资源 

Resources res = context.getResources();

一些牛人的blog 
http://rayleung.iteye.com/ 


屏幕切换时的问题 
获取屏幕的方向： 

默认情况下，当屏幕方面切换时，activity的onCreate()方法会被重新调用，所以可以在其中通过以下代码来读取屏的方向： 

public void onCreate() {
  if(this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
     Log.i("info", "landscape");
  } else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
     Log.i("info", "portrait");
  }
}

如果在androidmanifest.xml中加入配置 
android:configChanges="orientation|keyboardHidden|navigation 
当屏幕翻转时，Activity就不会重复的调用onCreate()、onPause()和onResume(). 
而是调用onConfigurationChanged(Configuration newConfig) 

测试时经常用到 

Toast.makeText(testActivity.this, "click button", Toast.LENGTH_SHORT).show();

bitmap 和 drawable 互换 

((BitmapDrawable)res.getDrawable(R.drawable.youricon)).getBitmap();