Android屏幕属性应用

一、获取屏幕大小 

DisplayMetrics dm = new DisplayMetrics(); 
getWindowManager().getDefaultDisplay().getMetrics(dm); 
textView1.setText("分辨率：宽:" + dm.widthPixels + "高:" + dm.heightPixels);

二、隐藏状态栏和标题栏

this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
        getWindow().setFlags(
        		WindowManager.LayoutParams.FLAG_FULLSCREEN,
        		WindowManager.LayoutParams.FLAG_FULLSCREEN);

三、切换屏幕方向

预先在manifest.xml定义屏幕方向

<activity
      android:name=".EX05_22"
      android:label="@string/app_name"
      android:screenOrientation="portrait"></activity>

 

private Button button1;
	private int width;
	private int height;
	
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.screen_change);
		
		button1 = (Button)findViewById(R.id.button1);
		
		button1.setOnClickListener(new OnClickListener(){

			public void onClick(View v) {
				DisplayMetrics dm = new DisplayMetrics(); 
				getWindowManager().getDefaultDisplay().getMetrics(dm); 
				width = dm.widthPixels;
				height = dm.heightPixels;
				if(width < height){
					setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
					toast("已切换横屏");
					
				}
				else{
					setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
					toast("已切换竖屏");
				}
			}
			
		});
	}
	
	public void toast(String str) {
		Toast.makeText(ScreenChange.this, str, Toast.LENGTH_LONG).show();
	}