Android的一個多線程和輕量級下載器：GigaGet

Android的一個多線程和輕量級下載器：GigaGet。

package us.shandian.giga;
import android.app.*;
import android.widget.TextView;
import android.os.*;
import java.util.concurrent.TimeUnit;
import us.shandian.giga.get.DownloadManager;
import us.shandian.giga.get.DownloadMission;
import us.shandian.giga.util.Utility;
public class TestActivity extends Activity implements DownloadMission.MissionListener
{
private DownloadManager mManager;
private TextView mText;
private long mLastTimeStamp;
private long mLastDone = 0;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mText = (TextView) findViewById(R.id.hello);
mLastTimeStamp = System.currentTimeMillis();
mManager = new DownloadManager(this, "/storage/sdcard0/GigaGet");
int id = 0;
if (mManager.getCount() == 0) {
id = mManager.startMission("http://dldir1.qq.com/qqfile/QQIntl/QQi_wireless/Android/qqi_5.0.10.6046_android_office.apk", "QQ.apk");
} else {
mManager.resumeMission(id);
}
mManager.getMission(id).addListener(this);
}
@Override
public void onProgressUpdate(long done, long total) {
long nowTimeStamp = System.currentTimeMillis();
long delta = nowTimeStamp - mLastTimeStamp;
// Prevent from too fast refresh rate
if (delta < 1000) return;
float speed = (float) (done - mLastDone) / delta * 1000;
mText.setText(String.format("%.2f%% speed:%s %s of %s", (float) done / total * 100, Utility.formatSpeed(speed), Utility.formatBytes(done), Utility.formatBytes(total)));
mLastDone = done;
mLastTimeStamp = nowTimeStamp;
}
@Override
public void onFinish() {
mText.setText("done");
}
}

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