HttpURLConnection使用GET下载zip文件
- [http get下载zip文件](#http get下载zip文件)
http get下载zip文件
MainActivity.java
用HttpURLConnection GET方法进行需注意：
1、Android 9及以上版本需要设置这个，否则会有警告
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
2、清单中要申请网络权限写入权限
< uses-permission android:name="android.permission.INTERNET" />
< uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
3、要在application中添加android:usesCleartextTraffic="true"。否则会有警告，好像加这个有风险，没有细研究
4、关于下载的位置Environment.getExternalStorageDirectory()的路径在/storage/emulated/0
5、关于下载的测试地址http://nginx.org/download/nginx-1.23.4.zip
6、关于下载的两种方式
java
package com.lxh.romupgrade;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class MainActivity extends AppCompatActivity {
Button bt_post;
Button bt_post2;
Context mcontext;
private static final String TAG = "MainActivity3 lxh";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt_post = findViewById(R.id.bt_post);
bt_post2 = findViewById(R.id.bt_post2);
mcontext = MainActivity.this;
bt_post.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.i(TAG, "onClick");
download_2();
}
});
bt_post2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.i(TAG, "onClick");
// Android 9及以上版本需要设置这个，否则会有警告
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
download_3();
}
});
}
private void download_2() {
new DownloadZipFileTask().execute();
}
public static void download_3() {
Log.i(TAG, "download_3");
String url = "http://nginx.org/download/nginx-1.23.4.zip";
FileOutputStream fos = null;
InputStream in = null;
try {
URL u = new URL(url);
HttpURLConnection conn = (HttpURLConnection) u.openConnection();
conn.setRequestMethod("GET");
int responseCode = conn.getResponseCode();
Log.i(TAG, "responseCode=" + responseCode);
if (responseCode == HttpURLConnection.HTTP_OK) {
fos = new FileOutputStream(Environment.getExternalStorageDirectory() + "/file3.zip");
byte[] buffer = new byte[1024];
int len;
while ((len = conn.getInputStream().read(buffer)) != -1) {
fos.write(buffer, 0, len);
}
fos.close();
conn.getInputStream().close();
Log.i(TAG, "download ok");
} else {
Log.i(TAG, "Handle error case here");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (in != null) {
try {
in.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
java
package com.lxh.romupgrade;
import android.os.AsyncTask;
import android.os.Environment;
import android.util.Log;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* create by lxh on 2023/10/10 Time：20:21
* tip:HTTP 下载
*/
public class DownloadZipFileTask extends AsyncTask<Void, Integer, Void> {
@Override
protected Void doInBackground(Void... params) {
Log.i("lxh", "doInBackground");
try {
URL url = new URL("http://nginx.org/download/nginx-1.23.4.zip");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.connect();
int fileSize = connection.getContentLength();
InputStream inputStream = connection.getInputStream();
FileOutputStream outputStream = new FileOutputStream(Environment.getExternalStorageDirectory() + "/file2.zip");
byte[] buffer = new byte[4096];
int bytesRead;
int totalBytesRead = 0;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
totalBytesRead += bytesRead;
int progress = (int) (totalBytesRead * 100 / fileSize);
publishProgress(progress);
}
Log.i("lxh", "download ok");
outputStream.close();
inputStream.close();
connection.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}AndroidMainfest.xml
需要在清单添加
java
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.lxh.romupgrade">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:usesCleartextTraffic="true"
android:theme="@style/Theme.Romupgrade">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>activity_main.xml
布局如下
java
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="@+id/bt_post"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="POST" />
<Button
android:id="@+id/bt_post2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="POST2" />
</LinearLayout>log
点击按钮回显如下
java
I/MainActivity3 lxh: onClick
I/lxh: doInBackground
D/NetworkSecurityConfig: No Network Security Config specified, using platform default
I/lxh: download ok
I/MainActivity3 lxh: onClick
I/MainActivity3 lxh: download_3
I/MainActivity3 lxh: responseCode=200
I/MainActivity3 lxh: download ok