try {
URL url = new URL(params[0]);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(10 * 1000); //超时时间
connection.connect(); //连接
if (connection.getResponseCode() == 200) { //返回的响应码200,是成功.
File file = new File("/mnt/sdcard/xxxx.apk");
file.createNewFile();
InputStream inputStream = connection.getInputStream();
ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream(); //缓存
byte[] buffer = new byte[1024 * 10];
while (true) {
int len = inputStream.read(buffer);
publishProgress(len);
if (len == -1) {
break; //读取完
}
arrayOutputStream.write(buffer, 0, len); //写入
}
arrayOutputStream.close();
inputStream.close();
byte[] data = arrayOutputStream.toByteArray();
FileOutputStream fileOutputStream = new FileOutputStream(file);
fileOutputStream.write(data); //记得关闭输入流
fileOutputStream.close();
}
} catch (MalformedURLException e) {
. e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
以上是读取APK文件并保存在了本地,InputStream转为FileOutputStream保存HttpURLConnection获取到的数据 。
那么只要再找到你的那个保存的路径就能实现安装了。
下面是安装和卸载的代码:
private void openFiles(File file) {
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");
startActivity(intent);
当然拉 ,这里不仅一种方法:以下方法也是可行的--
//下载apk程序代码
protected File downLoadFile(String httpUrl) {
final String fileName = "dujinyang.apk";
File tmpFile = new File("/sdcard/update");
if (!tmpFile.exists()) {
tmpFile.mkdir();//创建文件夹
}
final File file = new File("/sdcard/update/" + fileName);
try {
URL url = new URL(httpUrl);
try {
HttpURLConnection conn = (HttpURLConnection) url
.openConnection();
InputStream is = conn.getInputStream();
FileOutputStream fileOutput= new FileOutputStream(file);
byte[] buf = new byte[256];//分配byte
conn.connect();
double count = 0;
if (conn.getResponseCode() >= 400) {
Toast.makeText(Main.this, "连接超时", Toast.LENGTH_SHORT)
.show();
} else {
while (count <= 100) {
if (is != null) {
int numRead = is.read(buf);
if (numRead <= 0) {
break;
} else {
fileOutput.write(buf, 0, numRead);
}
} else {
break;
}
}
}
conn.disconnect();//需要记得关闭连接
fileOutput.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (MalformedURLException e) { e.printStackTrace();
}
return file;
}
URL url = new URL(params[0]);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(10 * 1000); //超时时间
connection.connect(); //连接
if (connection.getResponseCode() == 200) { //返回的响应码200,是成功.
File file = new File("/mnt/sdcard/xxxx.apk");
file.createNewFile();
InputStream inputStream = connection.getInputStream();
ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream(); //缓存
byte[] buffer = new byte[1024 * 10];
while (true) {
int len = inputStream.read(buffer);
publishProgress(len);
if (len == -1) {
break; //读取完
}
arrayOutputStream.write(buffer, 0, len); //写入
}
arrayOutputStream.close();
inputStream.close();
byte[] data = arrayOutputStream.toByteArray();
FileOutputStream fileOutputStream = new FileOutputStream(file);
fileOutputStream.write(data); //记得关闭输入流
fileOutputStream.close();
}
} catch (MalformedURLException e) {
. e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
以上是读取APK文件并保存在了本地,InputStream转为FileOutputStream保存HttpURLConnection获取到的数据 。
那么只要再找到你的那个保存的路径就能实现安装了。
下面是安装和卸载的代码:
首先说下卸载:
Uri packageURI = Uri.parse("package:xxx");
//package:xxx 这个形式是 package:程序完整的路径 (包名+程序名).
Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);startActivity(uninstallIntent);
注意:
Environment拥有一些可以获取环境变量的方法
然后是 安装:
String str = "/xxx.apk"; //APK的名字
String fileName = Environment.getExternalStorageDirectory() + str;//我们上面说到路径
(1)
//不打开APK程序代码
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive");startActivity(intent);
(2)
//打开APK程序代码private void openFiles(File file) {
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");
startActivity(intent);
}
当然拉 ,这里不仅一种方法:以下方法也是可行的--
//下载apk程序代码
protected File downLoadFile(String httpUrl) {
final String fileName = "dujinyang.apk";
File tmpFile = new File("/sdcard/update");
if (!tmpFile.exists()) {
tmpFile.mkdir();//创建文件夹
}
final File file = new File("/sdcard/update/" + fileName);
try {
URL url = new URL(httpUrl);
try {
HttpURLConnection conn = (HttpURLConnection) url
.openConnection();
InputStream is = conn.getInputStream();
FileOutputStream fileOutput= new FileOutputStream(file);
byte[] buf = new byte[256];//分配byte
conn.connect();
double count = 0;
if (conn.getResponseCode() >= 400) {
Toast.makeText(Main.this, "连接超时", Toast.LENGTH_SHORT)
.show();
} else {
while (count <= 100) {
if (is != null) {
int numRead = is.read(buf);
if (numRead <= 0) {
break;
} else {
fileOutput.write(buf, 0, numRead);
}
} else {
break;
}
}
}
conn.disconnect();//需要记得关闭连接
fileOutput.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (MalformedURLException e) { e.printStackTrace();
}
return file;
}
本文详细介绍了如何使用Java代码在Android设备上下载APK文件,并将其保存至指定路径。此外,还提供了安装与卸载APK的具体实现方法。
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