Call the installed software of the system to open the file in Android

Android calls the player installed in the system to play network streaming video

                 Uri uri = Uri.parse( "http://rbv01.ku6.com/omtSn0z_PTREtneb3GRtGg.mp4" );
               
                Intent intent = new Intent( Intent.ACTION_VIEW );
                intent.setDataAndType( uri, "video/mp4" );
                startActivity( intent );

 Call the image software viewer installed in the system to open the image

                Uri uri = Uri.parse( "http://10.8.2.152:7700/UpdateAPP/bzb.png" );
               
                Intent intent = new Intent( Intent.ACTION_VIEW );
                Log.v( "URI:::::::::", uri.toString() );
                intent.setDataAndType( uri, "image/*" );
                startActivity( intent );

Use the system's built-in browser to open the web page

                String Ustr ="https://www.baidu.com/";
                Intent intent = new Intent();
                intent.setAction("android.intent.action.VIEW");
                Uri content_url = Uri.parse(Ustr);
                intent.setData(content_url);
                startActivity(intent);
                System.out.println("连接可用");

                Uri uri = Uri.parse("https://www.baidu.com");

                Intent intent = new Intent(Intent.ACTION_VIEW, uri);

                startActivity(intent);

                Uri uri = Uri.parse( "https://www.baidu.com/" );
                Intent intent = new Intent( Intent.ACTION_VIEW );
                intent.setData( uri );
                startActivity( intent );

Specify a browser (judging whether to install a browser before using it, it will crash if you run it directly)

                Uri uri = Uri.parse("https://www.baidu.com");

                Intent intent = new Intent(Intent.ACTION_VIEW,uri);

                //intent.setClassName("com.UCMobile","com.uc.browser.InnerUCMobile");//打开UC浏览器

                intent.setClassName("com.tencent.mtt","com.tencent.mtt.MainActivity");//打开QQ浏览器

                startActivity(intent);

Example of judging whether the software is installed

 /**
     * 判断qq浏览器是否可用
     *
     * @param context
     * @return
     */
    public static boolean isQQClientAvailable(Context context) {
        final PackageManager packageManager = context.getPackageManager();
        List<PackageInfo> pinfo = packageManager.getInstalledPackages( 0 );
        if (pinfo != null) {
            for (int i = 0; i < pinfo.size(); i++) {
                String pn = pinfo.get( i ).packageName;
                if (pn.equals( "com.tencent.mtt" )) {
                    return true;
                }
            }
        }
        return false;
    }

Complementary system file browser

//进入文件选择
                Intent intent = new Intent( Intent.ACTION_GET_CONTENT );
                intent.setType( "*/*" );//设置类型，我这里是任意类型，任意后缀的可以这样写。
                intent.addCategory( Intent.CATEGORY_OPENABLE );
                startActivityForResult( intent, 1 );

//选择完成返回当前页面  onActivityResult 方法获取文件地址

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult( requestCode, resultCode, intent );

        if (resultCode == Activity.RESULT_OK) {
            if (requestCode == 1) {
                Uri uri = intent.getData();
                Toast.makeText( this, "文件路径：" + uri.getPath().toString(), Toast.LENGTH_SHORT ).show();
               // File file = new File( uri.getPath() );
                //startActivity( OpenFiles.getVideoFileIntent( file ) );


                //Intent intent1 = new Intent( Intent.ACTION_VIEW );
                intent.setDataAndType( uri, "video/mp4" );
                startActivity( intent );

            }
        }
    }



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//                Intent intent = new Intent( Intent.ACTION_GET_CONTENT );
//                intent.setType("*/*");//设置类型，我这里是任意类型，任意后缀的可以这样写。
intent.setType(“*/*”);
//                intent.addCategory( Intent.CATEGORY_OPENABLE );
//                try {
//                    startActivityForResult( Intent.createChooser( intent, "请选择一个要上传的文件" ),
//                            1 );
//                } catch (android.content.ActivityNotFoundException ex) {
 Potentially direct the user to the Market with a Dialog
//                    Toast.makeText( MainActivity.this, "请安装文件管理器", Toast.LENGTH_SHORT )
//                            .show();
//                }