安卓文件下载
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package com.bawei.xingweijin20171122;
import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.webkit.MimeTypeMap;
import android.widget.TextView;
import android.widget.Toast;
import com.bawei.xingweijin20171122.Bean.DataBean;
import com.bawei.xingweijin20171122.CallBack.ResultBack;
import com.bawei.xingweijin20171122.Http.HttpUtils;
import com.google.gson.Gson;
import java.io.File;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
// private Handler handler = new Handler();
long mTaskId;
DownloadManager downloadManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView download = (TextView) findViewById(R.id.TypeTwo_1);
download.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch(v.getId())
{
case R.id.TypeTwo_1:
HttpUtils.getInstance().get("https://www.zhaoapi.cn/version/getVersion?type=0", new ResultBack() {
@Override
public void success(String message) {
Gson gson = new Gson();
DataBean dataBean = gson.fromJson(message, DataBean.class);
//获得下载地址
String apkUrl = dataBean.getData().getApkUrl();
downloadAPK(apkUrl,"myApk");
}
@Override
public void failed(String message) {
Log.d("zzz",message);
}
});
break;
}
}
private void downloadAPK(String versionUrl, String versionName) {
//创建下载任务
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(versionUrl));
request.setAllowedOverRoaming(false);//漫游网络是否可以下载
//设置文件类型,可以在下载结束后自动打开该文件
MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
String mimeString = mimeTypeMap.getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(versionUrl));
request.setMimeType(mimeString);
//在通知栏中显示,默认就是显示的
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
request.setVisibleInDownloadsUi(true);
//sdcard的目录下的download文件夹,必须设置
request.setDestinationInExternalPublicDir("/download/", versionName);
//request.setDestinationInExternalFilesDir(),也可以自己制定下载路径
//将下载请求加入下载队列
downloadManager = (DownloadManager) MainActivity.this.getSystemService(MainActivity.this.DOWNLOAD_SERVICE);
//加入下载队列后会给该任务返回一个long型的id,
//通过该id可以取消任务,重启任务等等,看上面源码中框起来的方法
mTaskId = downloadManager.enqueue(request);
//注册广播接收者,监听下载状态
MainActivity.this.registerReceiver(receiver,new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
private BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
checkDownloadStatus();//检查下载状态
}
};
private void checkDownloadStatus() {
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(mTaskId);//筛选下载任务,传入任务ID,可变参数
Cursor c = downloadManager.query(query);
if (c.moveToFirst()) {
int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
switch (status) {
case DownloadManager.STATUS_PAUSED:
Log.i("zzz",">>>下载暂停");
case DownloadManager.STATUS_PENDING:
Log.i("zzz",">>>下载延迟");
case DownloadManager.STATUS_RUNNING:
Log.i("zzz",">>>正在下载");
break;
case DownloadManager.STATUS_SUCCESSFUL:
Log.i("zzz",">>>下载完成");
File file = Environment.getExternalStorageDirectory();
installAPK(new File(file+"/Download"));
break;
case DownloadManager.STATUS_FAILED:
Log.i("zzz",">>>下载失败");
break;
}
}
}
protected void installAPK(File file) {
if (!file.exists()) return;
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.parse("file://" + file.toString());
intent.setDataAndType(uri, "application/vnd.android.package-archive");
//在服务中开启activity必须设置flag,后面解释
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
MainActivity.this.startActivity(intent);
}
}
import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.webkit.MimeTypeMap;
import android.widget.TextView;
import android.widget.Toast;
import com.bawei.xingweijin20171122.Bean.DataBean;
import com.bawei.xingweijin20171122.CallBack.ResultBack;
import com.bawei.xingweijin20171122.Http.HttpUtils;
import com.google.gson.Gson;
import java.io.File;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
// private Handler handler = new Handler();
long mTaskId;
DownloadManager downloadManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView download = (TextView) findViewById(R.id.TypeTwo_1);
download.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch(v.getId())
{
case R.id.TypeTwo_1:
HttpUtils.getInstance().get("https://www.zhaoapi.cn/version/getVersion?type=0", new ResultBack() {
@Override
public void success(String message) {
Gson gson = new Gson();
DataBean dataBean = gson.fromJson(message, DataBean.class);
//获得下载地址
String apkUrl = dataBean.getData().getApkUrl();
downloadAPK(apkUrl,"myApk");
}
@Override
public void failed(String message) {
Log.d("zzz",message);
}
});
break;
}
}
private void downloadAPK(String versionUrl, String versionName) {
//创建下载任务
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(versionUrl));
request.setAllowedOverRoaming(false);//漫游网络是否可以下载
//设置文件类型,可以在下载结束后自动打开该文件
MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
String mimeString = mimeTypeMap.getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(versionUrl));
request.setMimeType(mimeString);
//在通知栏中显示,默认就是显示的
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
request.setVisibleInDownloadsUi(true);
//sdcard的目录下的download文件夹,必须设置
request.setDestinationInExternalPublicDir("/download/", versionName);
//request.setDestinationInExternalFilesDir(),也可以自己制定下载路径
//将下载请求加入下载队列
downloadManager = (DownloadManager) MainActivity.this.getSystemService(MainActivity.this.DOWNLOAD_SERVICE);
//加入下载队列后会给该任务返回一个long型的id,
//通过该id可以取消任务,重启任务等等,看上面源码中框起来的方法
mTaskId = downloadManager.enqueue(request);
//注册广播接收者,监听下载状态
MainActivity.this.registerReceiver(receiver,new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
private BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
checkDownloadStatus();//检查下载状态
}
};
private void checkDownloadStatus() {
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(mTaskId);//筛选下载任务,传入任务ID,可变参数
Cursor c = downloadManager.query(query);
if (c.moveToFirst()) {
int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
switch (status) {
case DownloadManager.STATUS_PAUSED:
Log.i("zzz",">>>下载暂停");
case DownloadManager.STATUS_PENDING:
Log.i("zzz",">>>下载延迟");
case DownloadManager.STATUS_RUNNING:
Log.i("zzz",">>>正在下载");
break;
case DownloadManager.STATUS_SUCCESSFUL:
Log.i("zzz",">>>下载完成");
File file = Environment.getExternalStorageDirectory();
installAPK(new File(file+"/Download"));
break;
case DownloadManager.STATUS_FAILED:
Log.i("zzz",">>>下载失败");
break;
}
}
}
protected void installAPK(File file) {
if (!file.exists()) return;
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.parse("file://" + file.toString());
intent.setDataAndType(uri, "application/vnd.android.package-archive");
//在服务中开启activity必须设置flag,后面解释
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
MainActivity.this.startActivity(intent);
}
}
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