主apk安裝次apk

 關聯的apk放在 assets目錄下面。代碼如下，只是在安裝關聯apk的時候是顯示安裝的。

private File getAssetFile(){

AssetManager asset = MainActivity.this.getAssets();
       try {

InputStream is = asset.open("Zxing.apk");

FileOutputStream fos = this.openFileOutput("Zxing.apk",Context.MODE_PRIVATE+Context.MODE_WORLD_READABLE);

byte[] buffer = new byte[1024];

int len = 0;

while((len=is.read(buffer))!=-1){

fos.write(buffer, 0, len)

}

fos.flush();

is.close();

fos.close();

return new File("Zxing.apk");

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

private void installApk(File file){
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(Intent.ACTION_VIEW);
String type = "android/vnd.android.package-archive";
intent .setDataAndType(Uri.from(file),type);
startActivity(intent);
}