我正在使用retrofit 2.0从服务器下载文件。我想显示一个显示下载进度的ProgressDialog。为此，我创建了IntentService来下载和编写文件以及BroadcastReceiver中的Activity来更新进度。
问题是ProgressDialog仅在下载完成后才会显示。
注意：我使用System.out.println来验证IntentService和BroadcastReceiver之间的通信是否同步。
活动代码
public class ProjectListActivity extends Activity {
SvcApi svc;
LocalBroadcastManager bManager;
ProgressDialog mapDialog = null;
LocalBroadcastManager bManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main_activity);
mapDialog = new ProgressDialog(ProjectListActivity.this);
getFile();
}
@Override
public void onResume() {
super.onResume();
registerReceiver(); // Registering my IntentService
}
public void onPause() {
super.onPause();
bManager.unregisterReceiver(broadcastReceiver); // Unregistering it
}
private void registerReceiver(){
bManager = LocalBroadcastManager.getInstance(this);
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Default_data.MESSAGE_PROGRESS);
intentFilter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
bManager.registerReceiver(broadcastReceiver, intentFilter);
}
private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals(Default_data.MESSAGE_PROGRESS)){
Download download = intent.getParcelableExtra("download");
System.out.println(" - broadcastReceiver MESSAGE_PROGRESS " +
"-> download.getProgress = " + download.getProgress());
if(!mapDialog.isShowing()){
mapDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mapDialog.setMessage("Baixando Mapa Offline");
mapDialog.setProgress(0);
mapDialog.setMax(download.getTotalFileSize());
mapDialog.setProgress(download.getProgress());
mapDialog.show();
System.out.println(" - mapDialog.isshowing? " + mapDialog.isShowing());
}
else{
mapDialog.setProgress(download.getProgress());
}
}
}
};
private void getFile(){
Intent intent = new Intent(this,DownloadService.class);
startService(intent);
}
}
下载服务代码
public class DownloadService extends IntentService {
public DownloadService() {
super("Download Service");
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
} // Using that avoid the StrictMode Exception
}
private int totalFileSize;
SvcApi svc;
long idproject;
@Override
protected void onHandleIntent(Intent intent) {
idproject = intent.getLongExtra("idproject",0);
initDownload(idproject);
}
private void initDownload(long idproject){
svc = Svc.initDownload(this);
if(svc != null){
Call< ResponseBody> call = svc.getMap(idproject);
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
if (response.isSuccessful()) {
try {
downloadFile(response.body());
}catch(Exception e){
e.printStackTrace();
}
} else {
int statusCode = response.code();
ResponseBody errorBody = response.errorBody();
Toast.makeText(getApplicationContext(), errorBody.toString(), Toast.LENGTH_SHORT).show();
}
}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
// handle execution failures like no internet connectivity
Toast.makeText(
getApplicationContext(),
"Erro de Conectividade. Tentar mais tarde.",
Toast.LENGTH_SHORT).show();
}
});
}
}
private void downloadFile(ResponseBody body) throws IOException {
int count;
byte data[] = new byte[1024 * 4];
long fileSize = body.contentLength();
InputStream bis = new BufferedInputStream(body.byteStream(), 1024 * 8);
File mediaStorageDir = new File("/sdcard/osmdroid/");
if (!mediaStorageDir.exists()) {
System.out.println("- LocalFileManager.SaveMap.MkDir: /sdcard/osmdroid/? " + mediaStorageDir.mkdirs());
}
OutputStream outputStream = null;
long total = 0;
long startTime = System.currentTimeMillis();
int timeCount = 1;
outputStream = new FileOutputStream(mediaStorageDir.getPath() + "/tiles.zip");
while ((count = bis.read(data)) != -1) {
total += count;
totalFileSize = (int) (fileSize / (Math.pow(1024, 2)));
double current = Math.round(total / (Math.pow(1024, 2)));
int progresss = (int) ((total * 100) / fileSize);
long currentTime = System.currentTimeMillis() - startTime;
Download download = new Download();
download.setTotalFileSize(totalFileSize);
if (currentTime > 1000 * timeCount) {
download.setCurrentFileSize((int) current);
download.setProgress(progresss);
sendIntent(download);
timeCount++;
}
outputStream.write(data, 0, count);
}
onDownloadComplete();
outputStream.flush();
outputStream.close();
bis.close();
}
private void sendIntent(Download download){
System.out.println("- DownloadService. Sending Intent.");
Intent intent = new Intent(Default_data.MESSAGE_PROGRESS);
intent.putExtra("download",download);
LocalBroadcastManager.getInstance(DownloadService.this).sendBroadcastSync(intent);
}
private void onDownloadComplete(){
Download download = new Download();
download.setProgress(100);
sendIntent(download);
}
}
下载课程代码
公共类下载实现Parcelable {
public Download(){
}
private int progress;
private int currentFileSize;
private int totalFileSize;
public int getProgress() {
return progress;
}
public void setProgress(int progress) {
this.progress = progress;
}
public int getCurrentFileSize() {
return currentFileSize;
}
public void setCurrentFileSize(int currentFileSize) {
this.currentFileSize = currentFileSize;
}
public int getTotalFileSize() {
return totalFileSize;
}
public void setTotalFileSize(int totalFileSize) {
this.totalFileSize = totalFileSize;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(progress);
dest.writeInt(currentFileSize);
dest.writeInt(totalFileSize);
}
private Download(Parcel in) {
progress = in.readInt();
currentFileSize = in.readInt();
totalFileSize = in.readInt();
}
public static final Parcelable.Creator<Download> CREATOR = new Parcelable.Creator<Download>() {
public Download createFromParcel(Parcel in) {
return new Download(in);
}
public Download[] newArray(int size) {
return new Download[size];
}
};
}
目录下载
10-19 11:23:10.743 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:10.753 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 1
10-19 11:23:10.773 30550-30550/palmaslab.com.palmap D/PhoneWindow: *FMB* installDecor mIsFloating : true
10-19 11:23:10.773 30550-30550/palmaslab.com.palmap D/PhoneWindow: *FMB* installDecor flags : 8388610
10-19 11:23:10.823 30550-30550/palmaslab.com.palmap I/System.out: - mapDialog.isshowing? true
10-19 11:23:11.744 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:11.744 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 6
10-19 11:23:12.745 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:12.745 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 10
10-19 11:23:13.836 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:13.836 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 14
10-19 11:23:14.747 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:14.747 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 21
10-19 11:23:15.788 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:15.788 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 26
10-19 11:23:16.739 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:16.739 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 31
10-19 11:23:17.750 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:17.750 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 37
10-19 11:23:18.751 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:18.751 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 42
10-19 11:23:19.742 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:19.742 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 47
10-19 11:23:20.743 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:20.743 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 53
10-19 11:23:21.744 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:21.744 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 58
10-19 11:23:22.745 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:22.745 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 63
10-19 11:23:23.766 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:23.766 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 68
10-19 11:23:24.016 30550-30578/palmaslab.com.palmap I/art: Background partial concurrent mark sweep GC freed 43556(1837KB) AllocSpace objects, 2(2MB) LOS objects, 25% free, 8MB/11MB, paused 1.068ms total 126.617ms
10-19 11:23:24.747 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:24.747 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 74
10-19 11:23:25.758 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:25.758 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 79
10-19 11:23:26.739 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:26.739 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 84
10-19 11:23:27.740 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:27.750 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 89
10-19 11:23:28.740 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:28.740 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 94
10-19 11:23:29.751 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:29.751 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 99
10-19 11:23:29.792 30550-30550/palmaslab.com.palmap I/System.out: - DownloadService. Sending Intent.
10-19 11:23:29.792 30550-30550/palmaslab.com.palmap I/System.out: - broadcastReceiver MESSAGE_PROGRESS -> download.getProgress = 100