我需要以编程方式安装apk文件。在this post之后我将我的apk文件放在我的C：驱动器的根目录中，但我的应用程序没有正确安装。我怎么能这样做？
这是我的代码：
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
canWriteOnExternalStorage();
downloadapk();
installApk();
}
});
private void downloadapk(){
try {
URL url = new URL("http://192.168.0.108/Root.apk");
HttpURLConnection urlConnection = (HttpURLConnection)
url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
File sdcard = Environment.getExternalStorageDirectory();
File dir = new File(sdcard.getAbsolutePath() + "/nazeer/");
dir.mkdirs();
File file = new File(dir, "filename");
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
fileOutput.write(buffer, 0, bufferLength);
}
fileOutput.close();
//this.checkUnknownSourceEnability();
//this.initiateInstallation();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private void installApk(){
Intent intent = new Intent(Intent.ACTION_VIEW);
File sdcard = Environment.getExternalStorageDirectory();
// to this path add a new directory path
File dir = new File(sdcard.getAbsolutePath() + "/nazeer/");
Uri uri = Uri.fromFile(dir);
intent.setDataAndType(uri, "application/vnd.android.package-archive");
startActivity(intent);
}
after a lot of reserch finnaly i get solution using this sample code
http://www.androidhive.info/2012/04/android-downloading-file-by-showing-progress-bar/
public class AndroidDownloadFileByProgressBarActivity extends Activity {
// button to show progress dialog
Button btnShowProgress;
// Progress Dialog
private ProgressDialog pDialog;
ImageView my_image;
// Progress dialog type (0 - for Horizontal progress bar)
public static final int progress_bar_type = 0;
// File url to download
private static String file_url =
"https://dl.dropboxusercontent.com/u/245131571/SampleApp.apk";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// show progress bar button
btnShowProgress = (Button) findViewById(R.id.btnProgressBar);
// Image view to show image after downloading
// my_image = (ImageView) findViewById(R.id.my_image);
/**
* Show Progress bar click event
* */
btnShowProgress.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// starting new Async Task
new DownloadFileFromURL().execute(file_url);
}
});
}
/**
* Showing Dialog
* */
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case progress_bar_type:
pDialog = new ProgressDialog(this);
pDialog.setMessage("Downloading file. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setMax(100);
pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pDialog.setCancelable(true);
pDialog.show();
return pDialog;
default:
return null;
}
}
/**
* Background Async Task to download file
* */
class DownloadFileFromURL extends AsyncTask<String, String, String> {
/**
* Before starting background thread
* Show Progress Bar Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(progress_bar_type);
}
/**
* Downloading file in background thread
* */
@Override
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
// getting file length
int lenghtOfFile = conection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(), 8192);
File file = new File(Environment.getExternalStorageDirectory() +
"/download2/");
if (!file.exists()) {
file.mkdir();
}
// file.mkdirs();
File outputFile = new File(file, "app.apk");
// FileOutputStream fos = new FileOutputStream(outputFile);
// Output stream to write file
// OutputStream output = new FileOutputStream("/sdcard/SampleApp.apk");
OutputStream output = new FileOutputStream(outputFile);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress(""+(int)((total*100)/lenghtOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
/**
* Updating progress bar
* */
protected void onProgressUpdate(String... progress) {
// setting progress percentage
pDialog.setProgress(Integer.parseInt(progress[0]));
}
/**
* After completing background task
* Dismiss the progress dialog
* **/
@Override
protected void onPostExecute(String file_url) {
// dismiss the dialog after the file was downloaded
dismissDialog(progress_bar_type);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new
File(Environment.getExternalStorageDirectory() + "/download2/" + "app.apk")),
"application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}
}
答案 0 :(得分：0)
将apk下载到sdcard后，用apk路径调用此方法..
protected void installApp() {
// TODO Auto-generated method stub
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(
Uri.fromFile(new File(Environment.getExternalStorageDirectory()
+ File.separator + "IHS_HIV.apk")),
"application/vnd.android.package-archive");
startActivity(intent);
finish();
}
从网址
下载Apk的方法protected void downloadFileFromUrl() {
// TODO Auto-generated method stub
try {
progressBar.setProgress(progressBar.getMax() - 50);
URL url = new URL(URL);
URLConnection connection = url.openConnection();
connection.connect();
// this will be useful so that you can show a typical 0-100%
// progress bar
int fileLength = connection.getContentLength();
File file = new File(Environment.getExternalStorageDirectory()
+ File.separator + "IHS_HIV.apk");
file.createNewFile();
// download the file
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(
Environment.getExternalStorageDirectory() + File.separator
+ "IHS_HIV.apk");
byte data[] = new byte[1024];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// publishProgress((int) (total * 100 / fileLength));
progressBar.setProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
ErrorLog.setErrorMessage(getApplicationContext(), e);
Log.e("File Creating Error", e.getMessage());
}
}
答案 1 :(得分：0)
请使用以下代码
public void Update(String apkurl){
try {
URL url = new URL(apkurl);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.connect();
String PATH = Environment.getExternalStorageDirectory() + "/download/";
File file = new File(PATH);
file.mkdirs();
File outputFile = new File(file, "app.apk");
FileOutputStream fos = new FileOutputStream(outputFile);
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();//till here, it works fine - .apk is download to my sdcard in download file
Intent promptInstall = new Intent(Intent.ACTION_VIEW)
.setData(Uri.parse(PATH+"app.apk"))
.setType("application/android.com.app");
startActivity(promptInstall);//installation is not working
} catch (IOException e) {
Toast.makeText(getApplicationContext(), "Update error!", Toast.LENGTH_LONG).show();
}
}