我想做的是绕过每次为 VPN 列表下载文件，因为加载需要太多时间。这是我的代码
正如您在此处的代码库 url 下载服务器列表中看到的那样 http://www.vpngate.net/api/iphone/但每次打开应用程序时，它都会尝试一次又一次地下载文件，我只想从本地存储而不是应用程序调用它。
我使用这个应用程序的源代码，你能帮我解决这个问题吗？
更新
How to bypass downloading file and include into app
我的SplashActivity.java
package com.baztro.ultravpn.activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Handler;
import android.os.Message;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.view.View;
import android.widget.TextView;
import com.baztro.ultravpn.util.NetworkState;
import com.androidnetworking.AndroidNetworking;
import com.androidnetworking.common.Priority;
import com.androidnetworking.error.ANError;
import com.androidnetworking.interfaces.DownloadListener;
import com.androidnetworking.interfaces.DownloadProgressListener;
import com.daimajia.numberprogressbar.NumberProgressBar;
import com.baztro.ultravpn.R;
import com.baztro.ultravpn.model.Server;
import com.baztro.ultravpn.util.PropertiesService;
import com.baztro.ultravpn.util.Stopwatch;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.security.PrivateKey;
import java.util.concurrent.TimeUnit;
import okhttp3.OkHttpClient;
public class SplashActivity extends BaseActivity {
private NumberProgressBar progressBar;
private TextView commentsText;
private static boolean loadStatus = false;
private Handler updateHandler;
private final int LOAD_ERROR = 0;
private final int DOWNLOAD_PROGRESS = 1;
private final int PARSE_PROGRESS = 2;
private final int LOADING_SUCCESS = 3;
private final int SWITCH_TO_RESULT = 4;
private final String BASE_URL = "http://www.vpngate.net/api/iphone/";
private final String BASE_FILE_NAME = "vpngate.csv";
private SharedPreferences sp;
private SharedPreferences.Editor editor ;
private boolean premiumStage = true;
private int percentDownload = 0;
private Stopwatch stopwatch;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
sp = getSharedPreferences("splash-detail", MODE_PRIVATE);
editor = sp.edit();
// if(sp.getBoolean("downloadComplete" == true))
// {
//
// Intent intent = new Intent(this, MainSplashActivity.class);
// startActivity(intent);
// }
if (NetworkState.isOnline()) {
if (loadStatus) {
Intent myIntent = new Intent(this, UserActivity.class);
startActivity(myIntent);
finish();
} else {
loadStatus = true;
}
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(getString(R.string.network_error))
.setMessage(getString(R.string.network_error_message))
.setNegativeButton(getString(R.string.ok),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
onBackPressed();
}
});
AlertDialog alert = builder.create();
alert.show();
}
progressBar = (NumberProgressBar)findViewById(R.id.number_progress_bar);
commentsText = (TextView)findViewById(R.id.commentsText);
if (getIntent().getBooleanExtra("firstPremiumLoad", false))
((TextView)findViewById(R.id.loaderPremiumText)).setVisibility(View.VISIBLE);
progressBar.setMax(100);
updateHandler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
switch (msg.arg1) {
case LOAD_ERROR: {
commentsText.setText(msg.arg2);
progressBar.setProgress(100);
} break;
case DOWNLOAD_PROGRESS: {
commentsText.setText(R.string.downloading_csv_text);
progressBar.setProgress(msg.arg2);
} break;
case PARSE_PROGRESS: {
commentsText.setText(R.string.parsing_csv_text);
progressBar.setProgress(msg.arg2);
} break;
case LOADING_SUCCESS: {
commentsText.setText(R.string.successfully_loaded);
progressBar.setProgress(100);
Message end = new Message();
end.arg1 = SWITCH_TO_RESULT;
updateHandler.sendMessageDelayed(end,500);
} break;
case SWITCH_TO_RESULT: {
if (PropertiesService.getConnectOnStart()) {
Server randomServer = getRandomServer();
if (randomServer != null) {
newConnecting(randomServer, true, true);
} else {
startActivity(new Intent(SplashActivity.this, UserActivity.class));
}
} else {
startActivity(new Intent(SplashActivity.this, UserActivity.class));
}
}
}
return true;
}
});
progressBar.setProgress(0);
}
@Override
protected void onResume() {
super.onResume();
downloadCSVFile(BASE_URL, BASE_FILE_NAME);
}
@Override
protected boolean useHomeButton() {
return false;
}
@Override
protected boolean useMenu() {
return false;
}
private void downloadCSVFile(String url, String fileName) {
stopwatch = new Stopwatch();
OkHttpClient okHttpClient = new OkHttpClient().newBuilder()
.connectTimeout(60, TimeUnit.SECONDS)
.readTimeout(60, TimeUnit.SECONDS)
.writeTimeout(60, TimeUnit.SECONDS)
.build();
AndroidNetworking.download(url, getCacheDir().getPath(), fileName)
.setTag("downloadCSV")
.setPriority(Priority.MEDIUM)
.setOkHttpClient(okHttpClient)
.build()
.setDownloadProgressListener(new DownloadProgressListener() {
@Override
public void onProgress(long bytesDownloaded, long totalBytes) {
if(totalBytes <= 0) {
// when we dont know the file size, assume it is 1200000 bytes :)
totalBytes = 1200000;
}
percentDownload = (int)((100 * bytesDownloaded) / totalBytes);
Message msg = new Message();
msg.arg1 = DOWNLOAD_PROGRESS;
msg.arg2 = percentDownload;
updateHandler.sendMessage(msg);
}
})
.startDownload(new DownloadListener() {
@Override
public void onDownloadComplete() {
editor.putBoolean("downloadComplete", true);
editor.apply();
parseCSVFile(BASE_FILE_NAME);
}
@Override
public void onError(ANError error) {
editor.putBoolean("downloadCompleteNo", false);
editor.apply();
Message msg = new Message();
msg.arg1 = LOAD_ERROR;
msg.arg2 = R.string.network_error;
updateHandler.sendMessage(msg);
}
});
}
private void parseCSVFile(String fileName) {
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader(getCacheDir().getPath().concat("/").concat(fileName)));
} catch (IOException e) {
e.printStackTrace();
Message msg = new Message();
msg.arg1 = LOAD_ERROR;
msg.arg2 = R.string.csv_file_error;
updateHandler.sendMessage(msg);
}
if (reader != null) {
try {
int startLine = 2;
int type = 0;
dbHelper.clearTable();
int counter = 0;
String line = null;
while ((line = reader.readLine()) != null) {
if (counter >= startLine) {
dbHelper.putLine(line, type);
}
counter++;
}
Message end = new Message();
end.arg1 = LOADING_SUCCESS;
updateHandler.sendMessageDelayed(end,200);
} catch (Exception e) {
e.printStackTrace();
Message msg = new Message();
msg.arg1 = LOAD_ERROR;
msg.arg2 = R.string.csv_file_error_parsing;
updateHandler.sendMessage(msg);
}
}
}
}
我评论了 if 条件，因为它会使应用程序崩溃
创建了一个文件 MainSplashActivity
package com.baztro.ultravpn.activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.baztro.ultravpn.R;
public class MainSplashActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_splash);
}
}
最佳答案
看来您首先需要修复 onDownloadComplete 方法。
public void onDownloadComplete() {
editor.putBoolean("downloadComplete", false);
editor.apply();
parseCSVFile(BASE_FILE_NAME);}
到
public void onDownloadComplete() {
editor.putBoolean("downloadComplete", true);
editor.apply();
parseCSVFile(BASE_FILE_NAME);
}
关于java - 我的应用程序中的共享首选项在启动画面中不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59429631/