android应用客户端自动升级
import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import android.app.AlertDialog; import android.app.Dialog; import android.app.ProgressDialog; import android.content.DialogInterface; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.os.Handler; public class Update extends BaseActivity { public ProgressDialog pBar; private Handler handler = new Handler(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.update); Dialog dialog = new AlertDialog.Builder(Update.this).setTitle("系统更新") .setMessage("发现新版本，请更新！")// 设置内容 .setPositiveButton("确定",// 设置确定按钮 new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { pBar = new ProgressDialog(Update.this); pBar.setTitle("正在下载"); pBar.setMessage("请稍候..."); pBar .setProgressStyle(ProgressDialog.STYLE_SPINNER); downFile("http://url:8765/OA.apk"); } }).setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // 点击"取消"按钮之后退出程序 } }).create();// 创建 // 显示对话框 dialog.show(); } void downFile(final String url) { pBar.show(); new Thread() { public void run() { HttpClient client = new DefaultHttpClient(); // params代表连接的url HttpGet get = new HttpGet(url); HttpResponse response; try { response = client.execute(get); HttpEntity entity = response.getEntity(); long length = entity.getContentLength(); InputStream is = entity.getContent(); FileOutputStream fileOutputStream = null; if (is != null) { File file = new File(Environment .getExternalStorageDirectory(), "OA.apk"); fileOutputStream = new FileOutputStream(file); byte[] buf = new byte; int ch = -1; int count = 0; while ((ch = is.read(buf)) != -1) { // baos.write(buf, 0, ch); fileOutputStream.write(buf, 0, ch); count += ch; if (length > 0) { } } } fileOutputStream.flush(); if (fileOutputStream != null) { fileOutputStream.close(); } down(); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }.start(); } void down() { handler.post(new Runnable() { public void run() { pBar.cancel(); update(); } }); } void update() { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(new File("/sdcard/OA.apk")), "application/vnd.android.package-archive"); startActivity(intent); } }
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