Android安装卸载程序具体操作方法解析

在Android安装卸载程序的源码中我们知道：

< activity android:name=".PackageInstallerActivity">   
< intent-filter>   
< action android:name="android.intent.action.VIEW" />   
< category android:name="android.intent.category.DEFAULT" />   
< data android:scheme="content" />   
< data android:scheme="file" />   
< data android:mimeType="application/vnd.android.package-archive" />   
< /intent-filter>   
< /activity>  
 
< activity android:name=".UninstallerActivity">   
< intent-filter>   
< action android:name="android.intent.action.VIEW" />   
< action android:name="android.intent.action.DELETE" />   
< category android:name="android.intent.category.DEFAULT" />   
< data android:scheme="package" />   
< /intent-filter>   
< /activity> 

  

因为根据里面的权限我们可以 从sd卡安装一个程序：

   

String fileName = Environment.getExternalStorageDirectory() + "/myApp.apk";   
Intent intent = new Intent(Intent.ACTION_VIEW);

intent.setDataAndType(Uri.parse("file://" + filePath),"application/vnd.android.package-archive");
//或者
//intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive"); 

startActivity(intent);  

 

Android安装卸载程序的操作中要想卸载一个程序;

Uri packageURI = Uri.parse("package:com.android.myapp");   
Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);   
startActivity(uninstallIntent);  

  

默认是不支持安装非市场程序的 因此判断一下

int result = Settings.Secure.getInt(getContentResolver(), Settings.Secure.INSTALL_NON_MARKET_APPS, 0);   
if (result == 0) {   
// show some dialog here   
// ...   
// and may be show application settings dialog manually   
Intent intent = new Intent();   
intent.setAction(Settings.ACTION_APPLICATION_SETTINGS);   
startActivity(intent);  
}