Tôi có một mã đơn giản được cho là thực hiện một tác vụ, khi nút được nhấp tải xuống tệp, lưu tệp vào thẻ SD và mở tệp đó. Mọi thứ hoạt động ngoại trừ trong quá trình tải xuống, đối với các tệp lớn hơn, kết nối sẽ giảm và thanh tiến trình bị treo - hầu như luôn ở mức 20%. Tôi đã tìm kiếm và tìm kiếm và không thể tìm ra việc cần làm để giữ cho kết nối còn sống và cho phép tải xuống hoàn tất. Bất kỳ ý tưởng nào về cách giữ kết nối luôn hoạt động để quá trình tải xuống hoàn tất thay vì dừng ở mức 20%?Android - Tải xuống tệp lớn - sử dụng async/progressdialog
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class DownloadTestActivity extends Activity {
public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
private Button startBtn;
private ProgressDialog mProgressDialog;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mProgressDialog = new ProgressDialog(DownloadTestActivity.this);
mProgressDialog.setMessage("Downloading...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
startBtn = (Button) findViewById(R.id.startBtn);
startBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
startDownload();
}
});
}
private void startDownload() {
DownloadFile downloadFile = new DownloadFile();
downloadFile
.execute("http://www.website.com/file.pdf");
}
class DownloadFile extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog.show();
}
@Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
mProgressDialog.setProgress(progress[0]);
}
@Override
protected String doInBackground(String... aurl) {
try {
URL url = new URL(aurl[0]);
URLConnection connection = url.openConnection();
connection.connect();
int fileLength = connection.getContentLength();
Log.d("ANDRO_ASYNC", "Lenght of file: " + fileLength);
InputStream input = new BufferedInputStream(url.openStream());
String path = Environment.getExternalStorageDirectory()
+ "/Android/Data/"
+ getApplicationContext().getPackageName() + "/files";
File file = new File(path);
file.mkdirs();
File outputFile = new File(file, "test1.doc");
OutputStream output = new FileOutputStream(outputFile);
byte data[] = new byte[8192];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress((int) (total * 100/fileLength));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
showPdf();
} catch (Exception e) {
}
return null;
}
private void showPdf() {
// TODO Auto-generated method stub
if(mProgressDialog != null){
mProgressDialog.dismiss();
}
File file = new File(Environment.getExternalStorageDirectory()
+ "/Android/Data/"
+ getApplicationContext().getPackageName()
+ "/files/test1.doc");
PackageManager packageManager = getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/msword");
List list = packageManager.queryIntentActivities(testIntent,
PackageManager.MATCH_DEFAULT_ONLY);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/msword");
startActivity(intent);
}
}
}
Chỉnh sửa thông tin logcat:
--------- beginning of /dev/log/system
W/InputManagerService( 199): Window already focused, ignoring focus gain of: [email protected]
--------- beginning of /dev/log/main
D/AndroidRuntime(20673):
D/AndroidRuntime(20673): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
D/AndroidRuntime(20673): CheckJNI is OFF
D/AndroidRuntime(20673): Calling main entry com.android.commands.pm.Pm
D/AndroidRuntime(20673): Shutting down VM
D/dalvikvm(20673): GC_CONCURRENT freed 101K, 82% free 467K/2560K, paused 1ms+0ms
D/dalvikvm(20673): Debugger has detached; object registry had 1 entries
I/AndroidRuntime(20673): NOTE: attach of thread 'Binder Thread #3' failed
D/AndroidRuntime(20687):
D/AndroidRuntime(20687): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
D/AndroidRuntime(20687): CheckJNI is OFF
D/AndroidRuntime(20687): Calling main entry com.android.commands.am.Am
I/ActivityManager( 199): START {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.myapp/.Activity} from pid 20687
D/AndroidRuntime(20687): Shutting down VM
D/dalvikvm(20687): GC_CONCURRENT freed 102K, 81% free 489K/2560K, paused 0ms+0ms
D/jdwp (20687): Got wake-up signal, bailing out of select
D/dalvikvm(20687): Debugger has detached; object registry had 1 entries
I/AndroidRuntime(20687): NOTE: attach of thread 'Binder Thread #3' failed
D/dalvikvm(20698): Late-enabling CheckJNI
I/ActivityManager( 199): Start proc com.myapp for activity com.myapp/.Activity: pid=20698 uid=10102 gids={1015, 3003}
I/dalvikvm(20698): Turning on JNI app bug workarounds for target SDK version 10...
V/PhoneStatusBar( 271): setLightsOn(true)
D/AudioHardware( 98): AudioHardware pcm playback is going to standby.
D/AudioHardware( 98): closePcmOut_l() mPcmOpenCnt: 1
I/ActivityManager( 199): Displayed com.myapp/.Activity: +197ms
W/InputManagerService( 199): Starting input on non-focused client [email protected] (uid=10098 pid=20011)
I/ActivityManager( 199): START {cmp=com.myapp/.Choice} from pid 20698
D/AudioHardware( 98): AudioHardware pcm playback is exiting standby.
D/AudioHardware( 98): openPcmOut_l() mPcmOpenCnt: 0
V/PhoneStatusBar( 271): setLightsOn(true)
I/ActivityManager( 199): Displayed com.myapp/.Choice: +93ms
D/ANDRO_ASYNC(20698): Lenght of file: 736768
D/dalvikvm(20698): GC_CONCURRENT freed 103K, 3% free 9403K/9607K, paused 2ms+3ms
W/NetworkStats( 199): found non-monotonic values; saving to dropbox
D/dalvikvm( 199): JIT code cache reset in 5 ms (1048440 bytes 13/0)
D/dalvikvm( 199): GC_CONCURRENT freed 1472K, 13% free 24697K/28231K, paused 12ms+14ms
D/AudioHardware( 98): AudioHardware pcm playback is going to standby.
D/AudioHardware( 98): closePcmOut_l() mPcmOpenCnt: 1
I/ActivityManager( 199): Force stopping package com.myapp uid=10102
I/ActivityManager( 199): Killing proc 20698:com.myapp/10102: force stop
W/ActivityManager( 199): Force removing ActivityRecord{41eb1ec0 com.myapp/.Choice}: app died, no saved state
I/InputDispatcher( 199): Dropping event because there is no focused window or focused application.
I/ActivityManager( 199): Force finishing activity ActivityRecord{418450c8 com.myapp/.Activity}
I/InputDispatcher( 199): Dropping event because there is no focused window or focused application.
W/InputDispatcher( 199): channel '417b41f0 com.myapp/com.myapp/.Activity (server)' ~ Consumer closed input channel or an error occurred. events=0x8
E/InputDispatcher( 199): channel '417b41f0 com.myapp/com.myapp.Activity (server)' ~ Channel is unrecoverably broken and will be disposed!
W/InputDispatcher( 199): Attempted to unregister already unregistered input channel '417b41f0 com.myapp/com.myapp.Activity (server)'
W/WindowManager( 199): Failed looking up window
W/WindowManager( 199): java.lang.IllegalArgumentException: Requested window [email protected] does not exist
W/WindowManager( 199): at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7176)
W/WindowManager( 199): at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7167)
W/WindowManager( 199): at com.android.server.wm.WindowState$DeathRecipient.binderDied(WindowState.java:1545)
W/WindowManager( 199): at android.os.BinderProxy.sendDeathNotice(Binder.java:417)
W/WindowManager( 199): at dalvik.system.NativeStart.run(Native Method)
I/WindowManager( 199): WIN DEATH: null
I/WindowManager( 199): WIN DEATH: Window{4175b280 com.myapp/com.myapp.Choice paused=false}
W/WindowManager( 199): Failed looking up window
W/WindowManager( 199): java.lang.IllegalArgumentException: Requested window [email protected] does not exist
W/WindowManager( 199): at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7176)
W/WindowManager( 199): at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7167)
W/WindowManager( 199): at com.android.server.wm.WindowState$DeathRecipient.binderDied(WindowState.java:1545)
W/WindowManager( 199): at android.os.BinderProxy.sendDeathNotice(Binder.java:417)
W/WindowManager( 199): at dalvik.system.NativeStart.run(Native Method)
I/WindowManager( 199): WIN DEATH: null
W/InputManagerService( 199): Got RemoteException sending setActive(false) notification to pid 20698 uid 10102
D/dalvikvm(20011): GC_CONCURRENT freed 460K, 32% free 9468K/13767K, paused 3ms+4ms
D/AudioHardware( 98): AudioHardware pcm playback is exiting standby.
D/AudioHardware( 98): openPcmOut_l() mPcmOpenCnt: 0
Làm cách nào để xác định tệp 'lớn'? Cỡ nào? – Squonk
Điện thoại có chuyển sang chế độ ngủ trong khi tải xuống không? – debracey
@MisterSquonk - không quá lớn, khoảng 8MB. Tôi sẽ cần tải xuống tối đa khoảng 35MB. – user1363871