Android程序使用代碼的安裝和卸載！！！

 

Android程序使用代碼的安裝和卸載！！！ 

安裝：

 

String str = "/CanavaCancel.apk";
String fileName = Environment.getExternalStorageDirectory() + str;
Intent intent = new Intent(Intent.ACTION_VIEW);
 intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive");
startActivity(intent);

String str = "/CanavaCancel.apk"; String fileName = Environment.getExternalStorageDirectory() + str; Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive"); startActivity(intent);

卸載：

Uri packageURI = Uri.parse("package:com.demo.CanavaCancel");
Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);
startActivity(uninstallIntent);

Uri packageURI = Uri.parse("package:com.demo.CanavaCancel"); Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI); startActivity(uninstallIntent);

Environment擁有一些可以獲取環境變量的方法 

package:com.demo.CanavaCancel 這個形式是 package:程序完整的路徑 (包名+程序名).

//下載apk程序代碼

protected File downLoadFile(String httpUrl) {
                final String fileName = "updata.apk";
                File tmpFile = new File("/sdcard/update");
                if (!tmpFile.exists()) {
                        tmpFile.mkdir();
                }
                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 fos = new FileOutputStream(file);
                                byte[] buf = new byte[256];
                                conn.connect();
                                double count = 0;
                                if (conn.getResponseCode() >= 400) {
                                        Toast.makeText(Main.this, "連接超時", Toast.LENGTH_SHORT).show();
                                } else {
                                        while (count <= 100) {
                                                if (is != null) {
                                                        int numRead = is.read(buf);
                                                        if (numRead <= 0) {
                                                                break;
                                                        } else {
                                                                fos.write(buf, 0, numRead);
                                                        }

                                                } else {
                                                        break;
                                                }

                                        }
                                }
                                conn.disconnect();
                                fos.close();
                                is.close();
                        } catch (IOException e) {

                                e.printStackTrace();
                        }
                } catch (MalformedURLException e) {
                        e.printStackTrace();
                }

                return file;
        }

protected File downLoadFile(String httpUrl) { final String fileName = "updata.apk"; File tmpFile = new File("/sdcard/update"); if (!tmpFile.exists()) { tmpFile.mkdir(); } 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 fos = new FileOutputStream(file); byte[] buf = new byte[256]; conn.connect(); double count = 0; if (conn.getResponseCode() >= 400) { Toast.makeText(Main.this, "連接超時", Toast.LENGTH_SHORT).show(); } else { while (count <= 100) { if (is != null) { int numRead = is.read(buf); if (numRead <= 0) { break; } else { fos.write(buf, 0, numRead); } } else { break; } } } conn.disconnect(); fos.close(); is.close(); } catch (IOException e) { e.printStackTrace(); } } catch (MalformedURLException e) { e.printStackTrace(); } return file; }

 

 
//打開APK程序代碼

private void openFile(File file) {
                // TODO Auto-generated method stub
                Log.e("OpenFile", file.getName());
                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);
        }

出自：http://blog.csdn.net/shazhuzhux/article/details/6454729