就像标题所说的那样。我尝试使用 AsyncTask 下载。下载的时候就卡了。我想也许我在下载之前做的太多了，但没有任何效果。下载开始前大约有 15 秒的延迟。它确实显示了下载进度条，但在等待 15 秒之前不会下载任何内容。这是我的代码：
package com.cydeon.plasmamodz;
import com.stericson.RootTools.RootTools;
import com.stericson.RootTools.exceptions.RootDeniedException;
import com.stericson.RootTools.execution.CommandCapture;
public class Bmod extends Activity {
private class DownloadFile extends AsyncTask<String, Integer, String>{
@Override
protected String doInBackground(String... sURL) {
try{
URL url = new URL(sURL[0]);
URLConnection connection = url.openConnection();
connection.connect();
//Shows 0-100% progress bar
int fileLength = connection.getContentLength();
//Download the file
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream("/sdcard/plasma/battery/batterymod.zip");
byte data[] = new byte[1024];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
//Publish the Progress
publishProgress((int) (total * 100/fileLength));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
}
return null;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog.show();
}
@Override
protected void onProgressUpdate(Integer... progress){
super.onProgressUpdate(progress);
mProgressDialog.setProgress(progress[0]);
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
mProgressDialog.dismiss();
Context context = getApplicationContext();
CharSequence text = "Download complete";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
}
}
ProgressDialog mProgressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.battery);
Button bInstallB = (Button) findViewById(R.id.bInstallBattery);
Button bReturnB = (Button) findViewById(R.id.bReturnBattery);
ImageView batteryView = (ImageView) findViewById(R.id.ivBattery);
Bundle battery;
battery = getIntent().getExtras();
final String andy = battery.getString("Andy");
final String bluebox = battery.getString("BlueBox");
final String circlepercent = battery.getString("CirclePercent");
final String circles = battery.getString("Circles");
final String digital = battery.getString("Digital");
final String dotted = battery.getString("Dotted");
final String fullcircle1 = battery.getString("FullCircle1");
final String fullcircle2 = battery.getString("FullCircle2");
final String gauge = battery.getString("Gauge");
final String honeycomb = battery.getString("Honeycomb");
if (andy != null){
batteryView.setImageResource(R.drawable.android);
}if (bluebox != null){
batteryView.setImageResource(R.drawable.bluebox);
}if (circlepercent != null){
batteryView.setImageResource(R.drawable.circlepercent);
}if (circles != null){
batteryView.setImageResource(R.drawable.circles);
}if (digital != null){
batteryView.setImageResource(R.drawable.digital);
}if (dotted != null){
batteryView.setImageResource(R.drawable.dotted);
}if (fullcircle1 != null){
batteryView.setImageResource(R.drawable.fullcircle1);
}if (fullcircle2 != null){
batteryView.setImageResource(R.drawable.fullcircle2);
}if (gauge != null){
batteryView.setImageResource(R.drawable.gauge);
}if (honeycomb != null){
batteryView.setImageResource(R.drawable.honeycomb);
}
mProgressDialog = new ProgressDialog(Bmod.this);
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
bInstallB.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (andy != null){
mProgressDialog.setMessage("Downloading Android Batttery Mod..." );
DownloadFile downloadFile = new DownloadFile();
downloadFile.execute("https://dl.dropbox.com/s/623weil5bodvzmq/Andy_Battery.zip");
}if (bluebox != null){
}if (circlepercent != null){
}if (circles != null){
}if (digital != null){
}if (dotted != null){
}if (fullcircle1 != null){
}if (fullcircle2 != null){
}if (gauge != null){
}if (honeycomb != null){
}
}
});
bReturnB.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
finish();
}
});
} }
那么，如果有人看到导致滞后的原因？