很多时候都需要升级app,就会在有下载app与安装app,本文就分为两块下载与安装,在文章底部附上DEMO
一、下载,此处下载使用的是OKHttp下载
public static final String URLStr = "https://cdn.weizhiyou.top/down/wzy.apk";//apk地址
// private ProgressBar progressBar;
public void downloadApk() {
DownloadUtil.get().download(URLStr, "download", new DownloadUtil.OnDownloadListener() {
@Override
public void onDownloadSuccess(final File file) {
runOnUiThread(new Runnable() {
@Override
public void run() {
progressBar.setVisibility(View.GONE);
Toast.makeText(HomeActivity.this, "下载完成", Toast.LENGTH_SHORT).show();
Log.e("LZ---apkpath",file.getAbsolutePath());//文件存储的路径
installAPK(HomeActivity.this, file);
}
});
}
@Override
public void onDownloading(final int progress) {
runOnUiThread(new Runnable() {
@Override
public void run() {
progressBar.setVisibility(View.VISIBLE);
progressBar.setProgress(progress);下载进度条
}
});
}
@Override
public void onDownloadFailed() {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(HomeActivity.this, "下载失败", Toast.LENGTH_SHORT).show();
}
});
}
});
}
二、下载完成后进入安装部分
/**
* 安装APK内容
*/
public void installAPK(Context mContext, File apkName) {
try {
if (!apkName.exists()) {
return;
}
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//安装完成后打开新版本
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); // 给目标应用一个临时授权
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {//判断版本大于等于7.0
//如果SDK版本>=24,即:Build.VERSION.SDK_INT >= 24,使用FileProvider兼容安装apk
String packageName = mContext.getApplicationContext().getPackageName();
String authority = new StringBuilder(packageName).append(".provider").toString();
Uri apkUri = FileProvider.getUriForFile(mContext, authority, apkName);
intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
} else {
intent.setDataAndType(Uri.fromFile(apkName), "application/vnd.android.package-archive");
}
mContext.startActivity(intent);
android.os.Process.killProcess(android.os.Process.myPid());//安装完之后会提示”完成” “打开”。
} catch (Exception e) {
}
}
三,下载的封装类DownloadUtil
package com.lxb.demo0325;
import android.os.Environment;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class DownloadUtil {
private static DownloadUtil downloadUtil;
private final OkHttpClient okHttpClient;
public static DownloadUtil get() {
if (downloadUtil == null) {
downloadUtil = new DownloadUtil();
}
return downloadUtil;
}
private DownloadUtil() {
okHttpClient = new OkHttpClient();
}
/**
* @param url 下载连接
* @param saveDir 储存下载文件的SDCard目录
* @param listener 下载监听
*/
public void download(final String url, final String saveDir, final OnDownloadListener listener) {
Request request = new Request.Builder().url(url).build();
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
// 下载失败
listener.onDownloadFailed();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
InputStream is = null;
byte[] buf = new byte[2048];
int len = 0;
FileOutputStream fos = null;
// 储存下载文件的目录
String savePath = isExistDir(saveDir);
try {
is = response.body().byteStream();
long total = response.body().contentLength();
File file = new File(savePath, getNameFromUrl(url));
fos = new FileOutputStream(file);
long sum = 0;
while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
sum += len;
int progress = (int) (sum * 1.0f / total * 100);
// 下载中
listener.onDownloading(progress);
}
fos.flush();
// 下载完成
listener.onDownloadSuccess(file);
} catch (Exception e) {
listener.onDownloadFailed();
} finally {
try {
if (is != null)
is.close();
} catch (IOException e) {
}
try {
if (fos != null)
fos.close();
} catch (IOException e) {
}
}
}
});
}
/**
* @param saveDir
* @return
* @throws IOException
* 判断下载目录是否存在
*/
private String isExistDir(String saveDir) throws IOException {
// 下载位置
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
File downloadFile = new File(Environment.getExternalStorageDirectory(), saveDir);
if (!downloadFile.mkdirs()) {
downloadFile.createNewFile();
}
String savePath = downloadFile.getAbsolutePath();
Log.e("savePath",savePath);
return savePath;
}
return null;
}
/**
* @param url
* @return
* 从下载连接中解析出文件名
*/
private String getNameFromUrl(String url) {
return url.substring(url.lastIndexOf("/") + 1);
}
public interface OnDownloadListener {
/**
* 下载成功
*/
void onDownloadSuccess(File str);
/**
* @param progress
* 下载进度
*/
void onDownloading(int progress);
/**
* 下载失败
*/
void onDownloadFailed();
}
}
核心代码已列出,需要看效果可以下载demo
下载链接地址需该自己文件地址
demo下载https://download.csdn/download/generallizhong/85735429?spm=1001.2014.3001.5501 -END
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