1.首先需要将文件复制保存到本地
2.然后执行安装
3.判断assets中的app是否已经安装过
public static boolean isAppInstalled(Context context, String packagename) {
final PackageManager packageManager = context.getPackageManager();
List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
List<String> pName = new ArrayList<String>();
if (pinfo != null) {
for (int i = 0; i < pinfo.size(); i++) {
String pn = pinfo.get(i).packageName;
pName.add(pn);
}
}
return pName.contains(packagename);
}
kotlin 复制assets中的问价以及执行安装的全部代码
fun copyAssets(context: Context, filename: String) {
val assetManager = context.assets
val inputIs: InputStream
val out: OutputStream
try {
inputIs = assetManager.open(filename)
val outFileName = Environment.getExternalStorageDirectory()
.absolutePath //保存到外部存储,大部分设备是sd卡根目录
val copyName = System.currentTimeMillis().toString() +"Thor.apk" //copy后具体名称
val outFile = File(outFileName, copyName)
out = FileOutputStream(outFile)
copyFile(inputIs, out)
inputIs.close()
out.flush()
out.close()
val file = File(outFileName, copyName)
val intent = Intent(Intent.ACTION_VIEW)
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
//>7.0时 用 provider 共享
intent.flags = Intent.FLAG_GRANT_READ_URI_PERMISSION
val contentUri = FileProvider.getUriForFile(
context, "com.thor.twallet.fileProvider", //这里与provider清单中一致
File(outFileName, copyName)
)
intent.setDataAndType(contentUri, "application/vnd.android.package-archive")
//这里是判断是否保存
put("install", true)
}else {
intent.setDataAndType(
Uri.fromFile(file),
"application/vnd.android.package-archive"
)
}
context.startActivity(intent)
}catch (e: IOException) {
}
}
@Throws(IOException::class)
private fun copyFile(inputIs: InputStream, out: OutputStream) {
val buffer = ByteArray(1024)
var read: Int
while (inputIs.read(buffer).also { read =it } != -1) {
out.write(buffer, 0, read)
}
}
