我正在使用下载管理器 api 下载大文件，我也实现了。但问题是，下载进度通知显示在状态栏中。但我想使用进度条在 Activity 中显示通知。那么有没有人做过，如果有请帮助我。
public class DownloadManagerActivity extends Activity {
private long enqueue;
private DownloadManager dm;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
long downloadId = intent.getLongExtra(
DownloadManager.EXTRA_DOWNLOAD_ID, 0);
Query query = new Query();
query.setFilterById(enqueue);
Cursor c = dm.query(query);
if (c.moveToFirst()) {
int columnIndex = c
.getColumnIndex(DownloadManager.COLUMN_STATUS);
if (DownloadManager.STATUS_SUCCESSFUL == c
.getInt(columnIndex)) {
ImageView view = (ImageView) findViewById(R.id.imageView1);
String uriString = c
.getString(c
.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
view.setImageURI(Uri.parse(uriString));
}
}
}
}
};
registerReceiver(receiver, new IntentFilter(
DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
public void onClick(View view) {
dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
Request request = new Request(
Uri.parse("http://www.vogella.de/img/lars/LarsVogelArticle7.png"));
enqueue = dm.enqueue(request);
}
最佳答案
这是我用来在 Activity 中显示进度条并且下载管理器请求下载的代码。
final ProgressDialog progressBarDialog= new ProgressDialog(this);
progressBarDialog.setTitle("Download App Data, Please Wait");
progressBarDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressBarDialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK",new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog,
int whichButton){
// Toast.makeText(getBaseContext(),
// "OK clicked!", Toast.LENGTH_SHORT).show();
}
});
progressBarDialog.setProgress(0);
new Thread(new Runnable() {
@Override
public void run() {
boolean downloading = true;
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
while (downloading) {
DownloadManager.Query q = new DownloadManager.Query();
q.setFilterById(DownloadManagerId); //filter by id which you have receieved when reqesting download from download manager
Cursor cursor = manager.query(q);
cursor.moveToFirst();
int bytes_downloaded = cursor.getInt(cursor
.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
int bytes_total = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
if (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS)) == DownloadManager.STATUS_SUCCESSFUL) {
downloading = false;
}
final int dl_progress = (int) ((bytes_downloaded * 100l) / bytes_total);
runOnUiThread(new Runnable() {
@Override
public void run() {
progressBarDialog.setProgress((int) dl_progress);
}
});
// Log.d(Constants.MAIN_VIEW_ACTIVITY, statusMessage(cursor));
cursor.close();
}
}
}).start();
//show the dialog
progressBarDialog.show();
}
}
关于java - 使用下载管理器下载时显示进度条，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20092460/