安装和卸载Android程序

文章转自：http://blog.youkuaiyun.com/fenghome/archive/2010/06/16/5673757.aspx

在Android安装卸载程序的源码中我们知道：

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1. <activityandroid:name=".PackageInstallerActivity">
2. <intent-filter>
3. <actionandroid:name="android.intent.action.VIEW"/>
4. <categoryandroid:name="android.intent.category.DEFAULT"/>
5. <dataandroid:scheme="content"/>
6. <dataandroid:scheme="file"/>
7. <dataandroid:mimeType="application/vnd.android.package-archive"/>
8. </intent-filter>
9. </activity>
11. <activityandroid:name=".UninstallerActivity">
12. <intent-filter>
13. <actionandroid:name="android.intent.action.VIEW"/>
14. <actionandroid:name="android.intent.action.DELETE"/>
15. <categoryandroid:name="android.intent.category.DEFAULT"/>
16. <dataandroid:scheme="package"/>
17. </intent-filter>
18. </activity>

因为根据里面的权限我们可以 从sd卡安装一个程序：

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1. StringfileName=Environment.getExternalStorageDirectory()+"/myApp.apk";
2. Intentintent=newIntent(Intent.ACTION_VIEW);
4. intent.setDataAndType(Uri.parse("file://"+filePath),"application/vnd.android.package-archive");
5. //或者
6. //intent.setDataAndType(Uri.fromFile(newFile(fileName)),"application/vnd.android.package-archive");
8. startActivity(intent);

Android安装卸载程序的操作中要想卸载一个程序：

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1. UripackageURI=Uri.parse("package:com.android.myapp");
2. IntentuninstallIntent=newIntent(Intent.ACTION_DELETE,packageURI);
3. startActivity(uninstallIntent);

默认是不支持安装非市场程序的 因此判断一下

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1. intresult=Settings.Secure.getInt(getContentResolver(),Settings.Secure.INSTALL_NON_MARKET_APPS,0);
2. if(result==0){
3. //showsomedialoghere
4. //...
5. //andmaybeshowapplicationsettingsdialogmanually
6. Intentintent=newIntent();
7. intent.setAction(Settings.ACTION_APPLICATION_SETTINGS);
8. startActivity(intent);
9. }

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