无论我能够使用Asynctask从服务器下载更新apk，还是正在使用Firebase来检查当前版本是否比服务器版本和旧版本都要新，我都在构建一个从Play商店私下分发的应用程序。然后将其下载并保存到手机存储中，但是当应用通过打开安装对话框意图安装它时，它暗恋的地方是我的代码（是否有一种特殊的方法来生成具有与原始证书相同证书的更新apk（i只需使用相同的密钥库生成它））
`public class MainActivity extends AppCompatActivity {
long cacheExpiration = 3000;
double version = 0;
int versionCode = BuildConfig.VERSION_CODE;
File downloadfolder;
Context context = this;
File output_file;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
check();}
private void check() {
final FirebaseRemoteConfig mfirebaseremotecofig = FirebaseRemoteConfig.getInstance();
mfirebaseremotecofig.setDefaults(R.xml.remote_config_defaults);
mfirebaseremotecofig.fetch(cacheExpiration).addOnCompleteListener(new OnCompleteListener<Void>() {
// @SuppressLint("SetTextI18n")
@Override
public void onComplete(@NonNull Task<Void> task) {
if(task.isSuccessful()){
version = mfirebaseremotecofig.getDouble("version");
Log.i("Info", "done");
TextView s = (TextView) findViewById(R.id.textView);
s.setText("version " + version );
if(version > versionCode){
Log.i("Info", "less");
UpdateApp atualizaApp = new UpdateApp();
atualizaApp.execute(my server url);
}
mfirebaseremotecofig.activateFetched();
}
else {
Log.i("AppConfig","AppConfig failed to load");
}
}
});
}
class UpdateApp extends AsyncTask<String, Integer, String> {
ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setTitle("Download in progress...");
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.setMax(100);
progressDialog.setProgress(0);
progressDialog.show();
progressDialog.setCancelable(true);
createFolder();
}
@Override
protected String doInBackground(String... params) {
String path = params[0];
int file_length;
Log.i("Info: path", path);
try {
URL url = new URL(path);
URLConnection urlConnection = url.openConnection();
urlConnection.connect();
file_length = urlConnection.getContentLength();
output_file = new File(downloadfolder, "updateapk.apk");
OutputStream outputStream = new FileOutputStream(output_file);
InputStream inputStream = new BufferedInputStream(url.openStream(), 8192);
byte[] data = new byte[1024];
int total = 0;
int count;
while ((count = inputStream.read(data)) != -1) {
total += count;
outputStream.write(data, 0, count);
int progress = 100 * total / file_length;
publishProgress(progress);
Log.i("Info", "Progress: " + Integer.toString(progress));
}
outputStream.flush();
outputStream.close();
inputStream.close();
Log.i("Info", "file_length: " + Integer.toString(file_length));
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return "Download complete.";
}
@Override
protected void onProgressUpdate(Integer... values) {
progressDialog.setProgress(values[0]);
}
@Override
protected void onPostExecute(String result) {
toinstall();
}
}
private void createFolder() {
if (isStoragePermissionGranted()) {
// String secStore = System.getenv("SECONDARY_STORAGE");
// File f_secs = new File(secStore);
// File folder = new File(Environment.getExternalStorageDirectory()+ File.separator + "DebugData");
downloadfolder = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "updateapk");
if (!downloadfolder.exists()) {
if (downloadfolder.mkdir()) {
Log.i("Info", "Folder succesfully created");
} else {
}
} else {
Log.i("Info", "Folder already exists");
}
}
}
public boolean isStoragePermissionGranted() {
if (Build.VERSION.SDK_INT >= 23) {
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED) {
return true;
} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
return false;
}
} else { //permission is automatically granted on sdk<23 upon installation
return true;
}
}
private void toinstall() {
//String path = output_file.toString();
//File toInstall = new File(path, "app-release.apk");
File folderold = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "updateapk");
File output_fileold = new File(folderold, "updateapk.apk");
String pathold = output_fileold.toString();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
//Uri apkUri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".provider", toInstall);
Intent intent = new Intent(Intent.ACTION_INSTALL_PACKAGE);
// intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "/updateapk/" +"updateapk.apk" );
intent.setData(Uri.parse(pathold));
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);
} else {
// Uri apkUri = Uri.fromFile(new File(pathold));
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(pathold), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}}
清单文件
`<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.youssef"
>
<uses-permission
android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.intent.extra.NOT_UNKNOWN_SOURCE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/paths" />
</provider>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<action android:name="android.intent.action.INSTALL_PACKAGE" />
<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>
</application>
</manifest>`
paths.xml文件
` <paths xmlns:android="http://schemas.android.com/apk/res/android">
<files-path name="name" path="."/>
</paths>`