Android 中的功能点

Android 隐藏导航栏

 

        <item name="android:windowFullscreen">true</item>

 

    public void setStatusBarFullTransparent() {
        if (Build.VERSION.SDK_INT >= 21) {//21表示5.0
            Window window = getWindow();
//            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
//            window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
//                    | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
//            window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
//            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
//            window.setStatusBarColor(Color.TRANSPARENT);
            // 隐藏状态栏
            getWindow().getDecorView().setSystemUiVisibility(
                    View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                            | View.SYSTEM_UI_FLAG_FULLSCREEN
                            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
            );

//            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN );

        } else if (Build.VERSION.SDK_INT >= 19) {//19表示4.4
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            //虚拟键盘也透明
            //getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        }
    }

 

Android的webView唤起打印机

    public void printWeb() {
        Log.i(TAG, "printWeb");
        if (mWebView != null) {
            String name = mWebView.getTitle()+".pdf";
            PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
            PrintAttributes.Builder builder = new PrintAttributes.Builder();
            builder.setColorMode(PrintAttributes.COLOR_MODE_COLOR);
            printManager.print("Print", mWebView.createPrintDocumentAdapter(name), builder.build());
        }
    }

 

Android & H5交互

1、Android 设置

        mLayoutRoot.addView(mWebView);

        WebSettings mWebSettings = mWebView.getSettings();
        mWebSettings.setSupportZoom(true);
        mWebSettings.setLoadWithOverviewMode(true);
        mWebSettings.setUseWideViewPort(true);
        mWebSettings.setDefaultTextEncodingName("utf-8");

        mWebSettings.setAllowContentAccess(true);
        mWebSettings.setAllowFileAccess(true);
        mWebSettings.setAllowFileAccessFromFileURLs(false);
        mWebSettings.setAllowUniversalAccessFromFileURLs(false);

        mWebSettings.setLoadsImagesAutomatically(true);
        mWebSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);

        //新添加，解决个别机型不兼容的问题
        mWebSettings.setTextZoom(100);

        mWebView.getSettings().setUserAgentString(mWebView.getSettings().getUserAgentString()+"lianxin-commom-app");
        //自动播放音乐
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            mWebSettings.setMediaPlaybackRequiresUserGesture(false);
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            mWebSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
        }

        //调用JS方法.安卓版本大于17,加上注解 @JavascriptInterface
        mWebSettings.setJavaScriptEnabled(true);

        saveData(mWebSettings);

        newWin(mWebSettings);

        mWebView.setWebChromeClient(webChromeClient);
        mWebView.setWebViewClient(webViewClient);


        addJsListener(this, "NativeBridge");
        mWebView.loadUrl(url);

@SuppressLint("JavascriptInterface")
    public void addJsListener(Object obj, String bridgeName) {
        mWebView.addJavascriptInterface(obj, bridgeName);
    }

 2、js调用Android的方法

//JS调用Android方法
    @JavascriptInterface
    public String jsCallAndroid(){
        Toast.makeText(this,"JS调用Android方法成功",Toast.LENGTH_LONG).show();
        return result;
    }

 

//JS调用Android方法-带参数
    @JavascriptInterface
    public String jsCallAndroid(int type){
        Toast.makeText(this,"JS调用Android方法成功,type----"+type,Toast.LENGTH_LONG).show();
        return result;
    }

如果js 调用的Android的方法内要处理webView 相关的操作，需要在主线程

    @JavascriptInterface
    public void printWeb() {
        Log.i(TAG, "printWeb");
        if (mWebView != null) {
            mWebView.post(new Runnable() {
                @Override
                public void run() {
                    Calendar calendar = Calendar.getInstance();
                    int year = calendar.get(Calendar.YEAR);
                    int month = calendar.get(Calendar.MONTH);
                    int day = calendar.get(Calendar.DAY_OF_MONTH);
                    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
                    String formattedDate = dateFormat.format(calendar.getTime());
                           
                    String name = "咨询报告" + formattedDate + ".pdf";
                    PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
                    PrintAttributes.Builder builder = new PrintAttributes.Builder();
                    builder.setColorMode(PrintAttributes.COLOR_MODE_COLOR);
                    printManager.print("Print", mWebView.createPrintDocumentAdapter(name), builder.build());
                }
            });
        }
    }

 

 

 3、JS调用Android

// JS中调用Android方法

window.NativeBridge.postMessage(message);
window.NativeBridge.printWeb();

 

 4、Android调用js

 protected void pushDeviceDataToWeb(String data) {
        if (mWebView != null) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    mWebView.loadUrl("javascript:pushDeviceDataToWeb( '" + data + "')");
                    mWebView.loadUrl("javascript:pushDeviceDataToWebHome( '" + data + "')");
                }
            });
        }
    }

 

Android WebView a 标签 设置下载监听

        //设置下载监听
        mWebView.setDownloadListener(new DownloadListener() {
            @Override
            public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
                //进行下载处理，跳转浏览器或者调用系统下载方法
                //保存图片到相册
                if (!PermissionTool.requestPermission(WebActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE)) {
                    new Thread(() -> saveImage(url)).start();
                }
            }
        });

 

Android 横屏

 android:screenOrientation="landscape"

 

Android 横屏toast 字体变大的处理办法

    /**
     * 更改字体大小
     */
    protected void initFontScale() {
        Configuration configuration = getResources().getConfiguration();
        configuration.fontScale = 1;
        //0.85 小, 1 标准大小, 1.15 大，1.3 超大 ，1.45 特大
        DisplayMetrics metrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(metrics);
        metrics.scaledDensity = configuration.fontScale * metrics.density;
        getResources().updateConfiguration(configuration, metrics);
    }

 

Android 屏幕常亮

                if(开启常亮){
                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
//                    Toast.makeText(this, "屏幕已开启常亮", Toast.LENGTH_SHORT).show();
                }else{
                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
//                    Toast.makeText(this, "屏幕已关闭常亮", Toast.LENGTH_SHORT).show();
                }

 

Android 去设置页面

    private void goToSettings() {
        Intent intent = new Intent();
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP) { // Android 5.0及以上
            intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
            intent.setData(Uri.fromParts("package", getPackageName(), null));
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { // Android 5.0
            intent.setAction(Settings.ACTION_SETTINGS);
        } else { // Android 4.4及以下
            intent.setAction(Settings.ACTION_APPLICATION_SETTINGS);
            intent.addCategory(Intent.CATEGORY_ALTERNATIVE);
            intent.setData(Uri.parse("package:" + getPackageName()));
        }
        startActivity(intent);
    }

 

Android 清理数据

                // 清理数据
                mWebView.clearCache(true);
                CookieManager.getInstance().removeAllCookies(null);
                CookieManager.getInstance().flush();
                mWebView.clearHistory();