Android 下载APK 安装APK 打开APK

来源：互联网发布：足球比赛抽签软件编辑：程序博客网时间：2024/04/30 01:16

今天有了一个这样的需求：下载一个apk文件，然后当你下载完成后，按钮的文字发生改变，变成点击安装，然后安装完成之后，变成打开。

这是下载apk的方法：

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/**
     * 后台在下面一个Apk 下载完成后返回下载好的文件
     *
     * @param httpUrl
     * @return
     */
    privateFile downFile(finalString httpUrl) {
 
        newThread(newRunnable() {
 
            @Override
            publicvoidrun() {
                try{
                    URL url = newURL(httpUrl);
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setConnectTimeout(5000);
                    FileOutputStream fileOutputStream = null;
                    InputStream inputStream;
                    if(connection.getResponseCode() == 200) {
                        inputStream = connection.getInputStream();
 
                        if(inputStream != null) {
                            file = getFile(httpUrl);
                            fileOutputStream = newFileOutputStream(file);
                            byte[] buffer = newbyte[1024];
                            intlength = 0;
 
                            while((length = inputStream.read(buffer)) != -1) {
                                fileOutputStream.write(buffer,0, length);
                            }
                            fileOutputStream.close();
                            fileOutputStream.flush();
                        }
                        inputStream.close();
                    }
 
                    System.out.println("已经下载完成");
                    // 往handler发送一条消息 更改button的text属性
                    Message message = handler.obtainMessage();
                    message.what = 1;
                    handler.sendMessage(message);
 
                }catch(MalformedURLException e) {
                    e.printStackTrace();
                }catch(IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
        returnfile;
    }

这是安装APK的方法：

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/**
     * 安装APK
     */
    privatevoidinstallApk() {
        Intent intent = newIntent(Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");
        startActivity(intent);
    }

这是打开APK的方法：

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/**
     * 打开已经安装好的apk
     */
    privatevoidopenApk(Context context, String url) {
        PackageManager manager = context.getPackageManager();
        // 这里的是你下载好的文件路径
        PackageInfo info = manager.getPackageArchiveInfo(Environment.getExternalStorageDirectory().getAbsolutePath()
                + getFilePath(url), PackageManager.GET_ACTIVITIES);
        if(info != null) {
            Intent intent = manager.getLaunchIntentForPackage(info.applicationInfo.packageName);
            startActivity(intent);
        }
    }

打开APK 这里弄了好久，之前不知道有个getLaunchIntentForPackage方法这个方法只要你能得到这个apk的报名，然后将包名加到后面，startActivity 它就会自动自动你的APK的主界面了。相信得到一个APK的的信息这个大家都会了，这里就不说了。

下面是我的所有代码：

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/**
 * 下载Apk 安装Apk 打开APK
 *
 * @author Administrator
 *
 */
publicclassMainActivity extendsActivity {
    privateButton button1;
    privatestaticfinal String URL_STRING = "http://gdown.baidu.com/data/wisegame/b7d7e4efd8199dea/tianyiyuedu_310.apk";
    privatestaticint down = 0;
    File file;
 
    privateHandler handler = newHandler() {
 
        @Override
        publicvoidhandleMessage(Message msg) {
            super.handleMessage(msg);
 
            switch(msg.what) {
            case1:
                button1.setText("点击安装");
                down = 1;
                break;
            case2:
                down = 2;
                button1.setText("打开");
                break;
            }
        }
 
    };
 
    @Override
    protectedvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        button1 = (Button) findViewById(R.id.button1);
        button1.setOnClickListener(newOnClickListener() {
 
            @Override
            publicvoidonClick(View v) {
                // 下载apk
                if(down == 0) {
                    downFile(URL_STRING);
                    button1.setText("正在下载");
                    // 安装APK
                }elseif(down == 1) {
                    installApk();
                    // 打开apk
                }elseif(down == 2) {
                    openApk(MainActivity.this, URL_STRING);
                }
 
            }
        });
 
    }
 
    // 接收到安装完成apk的广播
    BroadcastReceiver broadcastReceiver = newBroadcastReceiver() {
 
        @Override
        publicvoidonReceive(Context context, Intent intent) {
 
            System.out.println("接收到安装完成apk的广播");
 
            Message message = handler.obtainMessage();
            message.what = 2;
            handler.sendMessage(message);
        }
    };
 
    /**
     * 后台在下面一个Apk 下载完成后返回下载好的文件
     *
     * @param httpUrl
     * @return
     */
    privateFile downFile(finalString httpUrl) {
 
        newThread(newRunnable() {
 
            @Override
            publicvoidrun() {
                try{
                    URL url = newURL(httpUrl);
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setConnectTimeout(5000);
                    FileOutputStream fileOutputStream = null;
                    InputStream inputStream;
                    if(connection.getResponseCode() == 200) {
                        inputStream = connection.getInputStream();
 
                        if(inputStream != null) {
                            file = getFile(httpUrl);
                            fileOutputStream = newFileOutputStream(file);
                            byte[] buffer = newbyte[1024];
                            intlength = 0;
 
                            while((length = inputStream.read(buffer)) != -1) {
                                fileOutputStream.write(buffer,0, length);
                            }
                            fileOutputStream.close();
                            fileOutputStream.flush();
                        }
                        inputStream.close();
                    }
 
                    System.out.println("已经下载完成");
                    // 往handler发送一条消息 更改button的text属性
                    Message message = handler.obtainMessage();
                    message.what = 1;
                    handler.sendMessage(message);
 
                }catch(MalformedURLException e) {
                    e.printStackTrace();
                }catch(IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
        returnfile;
    }
 
    /**
     * 安装APK
     */
    privatevoidinstallApk() {
        Intent intent = newIntent(Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");
        startActivity(intent);
    }
 
    @Override
    protectedvoidonStart() {
        super.onStart();
 
        IntentFilter intentFilter = newIntentFilter();
        intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
        intentFilter.addDataScheme("package");
 
        // 注册一个广播
        registerReceiver(broadcastReceiver, intentFilter);
    }
 
    @Override
    protectedvoidonDestroy() {
        super.onDestroy();
        // 解除广播
        unregisterReceiver(broadcastReceiver);
    }
 
    /**
     * 打开已经安装好的apk
     */
    privatevoidopenApk(Context context, String url) {
        PackageManager manager = context.getPackageManager();
        // 这里的是你下载好的文件路径
        PackageInfo info = manager.getPackageArchiveInfo(Environment.getExternalStorageDirectory().getAbsolutePath()
                + getFilePath(url), PackageManager.GET_ACTIVITIES);
        if(info != null) {
            Intent intent = manager.getLaunchIntentForPackage(info.applicationInfo.packageName);
            startActivity(intent);
        }
    }
 
    /**
     * 根据传过来url创建文件
     *
     */
    privateFile getFile(String url) {
        File files = newFile(Environment.getExternalStorageDirectory().getAbsoluteFile(), getFilePath(url));
        returnfiles;
    }
 
    /**
     * 截取出url后面的apk的文件名
     *
     * @param url
     * @return
     */
    privateString getFilePath(String url) {
        returnurl.substring(url.lastIndexOf("/"), url.length());
    }
}

布局文件就只要一个按钮，就不贴出来了。还有一个东西，就是监听一个应用安装完成的广播，我这里是直接在代码中注册：

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IntentFilter filter = newIntentFilter(); 
       
    filter.addAction("android.intent.action.PACKAGE_ADDED"); 
    filter.addAction("android.intent.action.PACKAGE_REMOVED"); 
    filter.addDataScheme("package");

监听安装apk和卸载apk的广播，其它的相信大家看代码也能看懂了，代码有点粗糙（菜鸟一枚），有哪里写的不好的地方，欢迎大家指正。

这个程序我没有考虑其他的情况，比如apk安装出错了，要怎么处理，等等。。

忘记说了，还需要在配置文件中添加访问网络和往sd卡写文件的权限：

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<uses-permission android:name="android.permission.INTERNET">
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission></uses-permission>

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