在Android中要让一个程序的界面始终保持一个方向,不随手机方向转动而变化的办法: 只要在AndroidManifest.xml里面配置一下就可以了。
在AndroidManifest.xml的activity(需要禁止转向的activity)配置中加入 android:screenOrientation=”landscape”属性即可(landscape是横向,portrait是纵向)。例如:
Java 代码1. <application android:persistent="true"
2. android:label="@string/home_title" 3. android:icon="@drawable/ic_launcher_home"> 4. 5. <activity android:name="Home" 6. android:theme="@style/Theme" 7. android:launchMode="singleInstance" 8. android:stateNotNeeded="true" 9. android:screenOrientation="portrait"> 10. <intent-filter> 11. <action android:name="android.intent.action.MAIN" /> 12. <category android:name="android.intent.category.HOME"/> 13. <category android:name="android.intent.category.DEFAULT" /> 14. </intent-filter> 15. </activity><application android:persistent="true"
android:label="@string/home_title" android:icon="@drawable/ic_launcher_home"><activity android:name="Home"
android:theme="@style/Theme" android:launchMode="singleInstance" android:stateNotNeeded="true" android:screenOrientation="portrait"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.HOME"/> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> 另外,android中每次屏幕方向切换时都会重启Activity,所以应该在Activity销毁前保存当前活动的状态,在Activity 再次Create的时候载入配置,那样,进行中的游戏就不会自动重启了!要避免在转屏时重启activity,可以通过在androidmanifest.xml文件中重新定义方向(给每个activity加上 android:configChanges=”keyboardHidden|orientation”属性),并根据Activity的重写 onConfigurationChanged(Configuration newConfig)方法来控制,这样在转屏时就不会重启activity了,而是会去调用 onConfigurationChanged(Configuration newConfig)这个钩子方法。例如:
Java 代码
1. if(newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){
2. //横向 3. setContentView(R.layout.file_list_landscape); 4. }else{ 5. //竖向 6. setContentView(R.layout.file_list); 7. }if(newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){
//横向 setContentView(R.layout.file_list_landscape); }else{ //竖向 setContentView(R.layout.file_list); } 在模拟器中,要使程序转屏可以使用快捷键F12或Ctrl+F11来切换。当然在用命令行启动模拟器时可以直接使用参数emulator.exe -skin HVGA-L来启动横屏的程序。
android 禁止横竖屏切换时调用onCreate函数
2011-08-04 18:04 385人阅读 评论(0) 收藏 举报 在横竖屏切换的时候会重新调用onCreate方法,可以使用以下方法禁止切换的过程中调用onCreate方法,如果你需要横屏和竖屏使用不同的布局文件,可能这种方式是不行的,经过我自己写代码测试,如果当前是竖屏,经过切换后它并不会使用横屏的布局文件,而是将竖屏的布局文件使用在横屏状态下,不知道是我写的不合适还是本来就这样,希望和大家讨论这个问题。禁止调用onCreate方法:在Mainifest.xml的Activity元素中加入android:configChanges="orientation|keyboardHidden"属性
我写的测试程序:
view plaincopy to clipboardprint?package lzu.LandAndPortraintTest;
import android.app.Activity; import android.content.pm.ActivityInfo; import android.content.res.Configuration; import android.os.Bundle; public class LandAndPortraintTest extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); printSentence(); } public void printSentence(){ System.out.println("printSentence"); } public void printPortraintSentence(){ System.out.println("printSentence Portraint"); } public void printLandscapeSentence(){ System.out.println("printSentence Landscape"); } public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) { printLandscapeSentence(); } else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { printPortraintSentence(); } } } package lzu.LandAndPortraintTest;import android.app.Activity;
import android.content.pm.ActivityInfo; import android.content.res.Configuration; import android.os.Bundle;public class LandAndPortraintTest extends Activity {
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); printSentence(); } public void printSentence(){ System.out.println("printSentence"); } public void printPortraintSentence(){ System.out.println("printSentence Portraint"); } public void printLandscapeSentence(){ System.out.println("printSentence Landscape"); } public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) { printLandscapeSentence(); } else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { printPortraintSentence(); } } }layout-land下main.xml文件:view plaincopy to clipboardprint?<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> </LinearLayout> <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> </LinearLayout>layout-port下main.xml文件:view plaincopy to clipboardprint?<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/app_name" /> </LinearLayout> <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/app_name" /> </LinearLayout> values下strings.xml文件:view plaincopy to clipboardprint?<?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, LandAndPortraintTest!</string> <string name="app_name">LandAndPortraintTest</string> </resources> <?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, LandAndPortraintTest!</string> <string name="app_name">LandAndPortraintTest</string> </resources>