网络下载apk自动安装小例子，网络apk例子,package feng

网络下载apk自动安装小例子，网络apk例子,package feng

package feng.f8_6.activity;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import android.app.Activity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class HttpActivity extends Activity {    private Button btn;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        btn = (Button) findViewById(R.id.button1);        btn.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                new Thread() {                    public void run() {                        // 地址网上可用哦                        String path = "http://res.neng.com/res/apk_sp/20120803/8124_com.mobi.filemanager.activity_163508.apk";//                      String path = "http://192.168.1.62:8080/MyHttpTest.apk";                        try {                            URL url = new URL(path);                            HttpURLConnection conn = (HttpURLConnection) url                                    .openConnection();                            if (HttpURLConnection.HTTP_OK != conn                                    .getResponseCode()) {                                Message message = Message.obtain();                                message.what = 1;                                handler.sendMessage(message);                            } else {                                if (Environment.getExternalStorageState()                                        .equals(Environment.MEDIA_UNMOUNTED)) {                                     Message message=Message.obtain();                                     message.what=2;                                     handler.sendMessage(message);                                } else {                                    // System.out.println("获取信息的长度："+conn.getContentLength());                                    File file = new File(Environment                                            .getExternalStorageDirectory()                                            + "/feng");                                    if (!file.exists()) {                                        file.mkdir();                                    }                                    // System.out.println("file.getPath():"                                    // + file.getPath());                                    // System.out.println("getContentLength:"                                    // + conn.getContentLength());                                    File cfile = new File(file.getPath(),                                            "activity_163508.apk");                                    if (!cfile.exists()) {                                        cfile.createNewFile();                                    }                                    InputStream is = conn.getInputStream();                                    FileOutputStream os = new FileOutputStream(                                            cfile);                                    byte[] buffer = new byte[2048];                                    int a=0;                                    while ((a=is.read(buffer)) != -1) {                                        os.write(buffer, 0, a);                                    }//                                  System.out.println("cfile.getName()"+cfile.getName());                                    is.close();                                    os.flush();                                    os.close();                                    Bundle bundle=new Bundle();                                    Message message=Message.obtain();                                    message.what=3;                                    bundle.putString("msg", cfile.getAbsolutePath());                                    message.setData(bundle);                                    handler.sendMessage(message);                                }                            }                        } catch (Exception e) {                            // TODO Auto-generated catch block                            e.printStackTrace();                        }                    };                }.start();            }        });    }    private void installAPK(String fileName){        File file =new File(fileName);        if(!file.exists()){            return;        }        Intent intent=new Intent();        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.setAction(Intent.ACTION_VIEW);        intent.setDataAndType(Uri.parse("file://"+file.toString()), "application/vnd.android.package-archive");        startActivity(intent);    }    Handler handler = new Handler() {        public void handleMessage(android.os.Message msg) {            switch (msg.what) {            case 1:                Toast.makeText(getApplicationContext(), "网络不通",                        Toast.LENGTH_SHORT).show();                break;            case 2:                 Toast.makeText(getApplicationContext(), "没有SD卡",                 Toast.LENGTH_SHORT).show();                break;            case 3:                Bundle bundle = msg.getData();                String fileName = bundle.getString("msg");                installAPK(fileName);                break;            default:                break;            }        };    };    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.main, menu);        return true;    }}<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:layout_marginLeft="43dp"        android:layout_marginTop="19dp"        android:text="Button" /></RelativeLayout>