對螢幕方向調節隻需要通過Activity.getRequestOrientation()方法和Activity.setRequestOrientation()方法即可。
執行個體說明:兩個按鈕,可以橫向和縱向調節螢幕。
MainActivity.java代碼:
public class MainActivity extends Activity {
private Button button1,button2;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1=(Button)findViewById(R.id.button1);
button2=(Button)findViewById(R.id.button2);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
});
button2.setOnClickListener(new View.OnClickListener() {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
if(getRequestedOrientation()==ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED){
button1.setEnabled(true);
button2.setEnabled(true);
else if(getRequestedOrientation()==ActivityInfo.SCREEN_ORIENTATION_PORTRAIT){
button2.setEnabled(false);
else if(getRequestedOrientation()==ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE){
button1.setEnabled(false);
其中,if語句的作用是當螢幕方向是預設時,可以随意調節,當螢幕縱向時,隻能調節成橫向,反之亦然。