android_37_使用开源xUtils进行下载

将Jar包copy到libs目录下

效果:





清单:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.sg31.xutils"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />

// 注意权限
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>


布局:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.sg31.xutils.MainActivity"
android:orientation="vertical"
>

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="下载"
android:onClick="downloadBtnClicked"
/>
<TextView
android:id="@+id/tv_failure"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ProgressBar
android:id="@+id/pb"
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="@android:style/Widget.ProgressBar.Horizontal"
/>
<TextView
android:id="@+id/tv_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>

</LinearLayout>

代码:

package com.sg31.xutils;

import java.io.File;

import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

private TextView tv_failure;
private TextView tv_progress;
private ProgressBar pb;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

tv_failure = (TextView) findViewById(R.id.tv_failure);
tv_progress = (TextView) findViewById(R.id.tv_progress);
pb = (ProgressBar) findViewById(R.id.pb);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}

public void downloadBtnClicked(View v){
HttpUtils utils = new HttpUtils();

String fileName = "NEXT_TO_YOU.mp3";
// 确定下载地址
String path = "http://od8vj43og.bkt.clouddn.com/" + fileName;
utils.download(path, //下载地址
"sdcard/"+fileName, //文件保存路径
true,//是否支持断点续传
true, new RequestCallBack<File>() {

//下载成功后调用
@Override
public void onSuccess(ResponseInfo<File> arg0) {
Toast.makeText(MainActivity.this, arg0.result.getPath(), 0).show();
}

//下载失败调用
@Override
public void onFailure(HttpException arg0, String arg1) {
tv_failure.setText(arg1);
}

@Override
public void onLoading(long total, long current,
boolean isUploading) {
super.onLoading(total, current, isUploading);
pb.setMax((int)total);
pb.setProgress((int)current);
tv_progress.setText(current * 100 / total + "%");
}

});
}

}