Android使用Xutil3.0下载文件.md
新建项目:
引入依赖:
implementation 'org.xutils:xutils:3.5.0'
添加权限:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
修改文件:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/xiazai"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="下载测试按钮"
/>
<ProgressBar
android:id="@+id/prg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="@style/Base.Widget.AppCompat.ProgressBar.Horizontal"
/>
</LinearLayout>
MainActivity:
package com.example.administrator.xutilstest;
import android.media.SoundPool;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.Toast;
import org.xutils.common.Callback;
import org.xutils.ex.HttpException;
import org.xutils.http.RequestParams;
import org.xutils.x;
import java.io.File;
public class MainActivity extends AppCompatActivity {
private ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar = findViewById(R.id.prg);
x.Ext.init(getApplication());
x.Ext.setDebug(BuildConfig.DEBUG); // 是否输出debug日志, 开启debug会影响性能.
Button button = findViewById(R.id.xiazai);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String url = "http://localhost:8080/gh.zip";
RequestParams params = new RequestParams(url);
// 默认缓存存活时间, 单位:毫秒(如果服务器没有返回有效的max-age或Expires则参考)
params.setCacheMaxAge(1000 * 60);
x.http().get(params, new Callback.ProgressCallback<File>() {
@Override
public void onSuccess(File result) {
System.out.println("下载成功");
}
@Override
public void onError(Throwable ex, boolean isOnCallback) {
}
@Override
public void onCancelled(CancelledException cex) {
}
@Override
public void onFinished() {
}
private boolean hasError = false;
private String result = null;
@Override
public void onWaiting() {
}
@Override
public void onStarted() {
System.out.println("开始下载");
}
@Override
public void onLoading(long total, long current, boolean isDownloading) {
progressBar.setMax((int) total);
progressBar.setProgress((int) current);
}
});
}
});
}
}