public class OkHttpDownloadApk {
private OkHttpClient okHttpClient;
private static OkHttpDownloadApk downloadUtil;
public static OkHttpDownloadApk get() {
if (downloadUtil == null) {
downloadUtil = new OkHttpDownloadApk();
}
return downloadUtil;
}
public OkHttpDownloadApk() {
okHttpClient = new OkHttpClient();
}
/*
*
* */
public void download(final String url, final String destFileDir, final String destFileName, final OnDownloadListener listener) {
new Thread(new Runnable() {
@Override
public void run() {
Request request = new Request.Builder()
.url(url)
.build();
OkHttpClient client = new OkHttpClient();
try {
Response response = client.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
//异步请求
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
// 下载失败监听回调
listener.onDownloadFailed(e);
}
@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
File dir = new File(destFileDir);
if (!dir.exists()) {
dir.mkdirs();
}
File file = new File(dir, destFileName);
try {
is = response.body().byteStream();
long total = response.body().contentLength();
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);
//下载中更新进度条
listener.onDownloading(progress);
}
fos.flush();
//下载完成
listener.onDownloadSuccess(file);
} catch (Exception e) {
listener.onDownloadFailed(e);
} finally {
try {
if (is != null) {
is.close();
}
if (fos != null) {
fos.close();
}
} catch (IOException e) {
}
}
}
});
}
}).start();
}
public interface OnDownloadListener {
/**
* 下载成功之后的文件
*/
void onDownloadSuccess(File file);
/**
* 下载进度
*/
void onDownloading(int progress);
/**
* 下载异常信息
*/
void onDownloadFailed(Exception e);
}
//上面是工具类 配置好 OKHttp的依赖 即可使用 下载文件的进度也会利用接口 提供好
//下面是 内部下载 apk 安装 以及遇到的问题 遇到的问题 动态获取权限等 9.0 不能使用http请求等 问题
/*
* 下载好 apk
* 安装
*
* */
protected void installAPK(String absolutePath, String apkName) {
File apkFile = new File(absolutePath, apkName);//"版本名称"
Intent intent = new Intent(Intent.ACTION_VIEW);
try {
String[] command = {"chmod", "", absolutePath};
ProcessBuilder builder = new ProcessBuilder(command);
builder.start();
} catch (Exception ignored) {
ignored.printStackTrace();
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri contentUri = FileProvider.getUriForFile(this, "com.example.windows.fileprovider", apkFile);//必须要用 自己包下面的fileprovider
intent.setDataAndType(contentUri, "application/vnd.android.package-archive");
} else {
intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
}
startActivity(intent);
}
<external-path name="external_files" path="."/>
<network-security-config>
<base-config cleartextTrafficPermitted="true" />
</network-security-config>
<paths>
<external-path
name="my_images"
path="Pictures" />
</paths>
动态权限申请
if (Build.VERSION.SDK_INT >= 23) {//如果是6.0以上的
int REQUEST_CODE_CONTACT = 101;
String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
//验证是否许可权限
for (String str : permissions) {
if (OkHttpActivity.this.checkSelfPermission(str) != PackageManager.PERMISSION_GRANTED) {
//申请权限
OkHttpActivity.this.requestPermissions(permissions, REQUEST_CODE_CONTACT);
return;
}
}
}
遇到问题 不要慌 。。最后 利用 Handler Handler把下载进度更新一下
OkHttp.get().download(apkUrl, absolutePath, "zhishi.apk", new OkHttp.OnDownloadListener() {
@Override
public void onDownloadSuccess(File file) {
// if (progressBar != null && progressBar.isShowing()) {
// progressBar.dismiss();
// }
//下载完成进行相关逻辑操作
Message msg = mHandler.obtainMessage();
msg.what = 0;
mHandler.sendMessage(msg);
}
@Override
public void onDownloading(int progress) {
Message msg = mHandler.obtainMessage();
msg.what = 11;
msg.obj = progress;
mHandler.sendMessage(msg);
}
@Override
public void onDownloadFailed(Exception e) {
Message msg = mHandler.obtainMessage();
msg.what = 1;
msg.obj = e;
mHandler.sendMessage(msg);
}
});
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case 0:
//已经完成
Toast.makeText(OkHttpActivity.this, "下载完成", Toast.LENGTH_SHORT).show();
installAPK(absolutePath);
break;
case 11:
int p = (int) msg.obj;
progressBar.setProgress(p);
Log.i("@@", "P=" + p);///storage/emulated/0
break;//进度条
case 1:
//下载失败
Toast.makeText(OkHttpActivity.this, "下载失败", Toast.LENGTH_SHORT).show();
break;
}
}
};
看下效果
}