Android 设置横屏/竖屏

模拟当点击按钮时，使手机朝向发生改变。

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.iaiai.activity" android:versionCode="1"
  android:versionName="1.0">
  <uses-sdk android:minSdkVersion="8" />

  <application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name="IaiaiActivity" android:label="@string/contact_title"
      android:configChanges="orientation">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <activity android:name="NextActivity" android:label="@string/contact_title"></activity>
  </application>
  <!-- 改变手机配置权限 -->
  <uses-permission android:name="android.permission.CHANGE_CONFIGURATION" />
</manifest>

[color=darkred]*设置手机的朝向，不然无法获取手机的朝向，必须设置这个参数: android:configChanges="orientation"[/color]

IaiaiActivity.java类:

package com.iaiai.activity;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class IaiaiActivity extends Activity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    onScreenChanged(getResources().getConfiguration().orientation);

    setContentView(R.layout.main);

    Button btnfx = (Button) findViewById(R.id.btn_fx);
    btnfx.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        // 判断是否可以获得requestedOrientation属性
        if (getRequestedOrientation() == -1) {
          Toast.makeText(IaiaiActivity.this, "系统的朝向无法获取",
              Toast.LENGTH_LONG).show();
        } else {
          if (getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
          } else if (getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
          }
        }
      }
    });
  }

  /**
   * 手机横屏
   * 
   * @param direction
   */
  public void onScreenChanged(int direction) {
    switch (direction) {
    case ActivityInfo.SCREEN_ORIENTATION_USER:
      Log.i("***************", "当前屏幕朝向为： 横屏");
      break;
    }
  }

  /**
   * 手机竖屏
   * 
   * @param newConfig
   */
  @Override
  public void onConfigurationChanged(Configuration newConfig) {
    switch (newConfig.orientation) {
    case ActivityInfo.SCREEN_ORIENTATION_PORTRAIT:
      Log.i("***************", "当前屏幕朝向为： 竖屏");
      break;
    }
    super.onConfigurationChanged(newConfig);
  }
}

运行结果:

[img]http://dl.iteye.com/upload/attachment/496918/db7983af-a0be-323e-ba38-c8cd5ed2d49a.jpg[/img]

[img]http://dl.iteye.com/upload/attachment/496920/2fc07950-195d-321c-a2fd-5ee69536d450.jpg[/img]