WebView相关总结

最新推荐文章于 2024-09-09 19:50:47 发布

原创最新推荐文章于 2024-09-09 19:50:47 发布 · 300 阅读

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#webview #安卓控件

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public class WebViewActivity extends BaseActivity {
    ProgressDialog dialog;
    EditText wangZhi;
    Button fangWen;
    private WebView webView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.web_view_layout);

        wangZhi = (EditText) findViewById(R.id.wangZhi);
        fangWen = (Button) findViewById(R.id.fangWen);
        webView = (WebView) findViewById(R.id.webView);
        //启用JAVASCRIPT------------------------------
        WebSettings settings = webView.getSettings();
        settings.setJavaScriptEnabled(true);
        //判断加载进程-------------------------------
        webView.setWebChromeClient(new WebChromeClient(){
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                if(newProgress == 100){
                    closeDialog();
                }else{
                    openDialog(newProgress);
                }
                super.onProgressChanged(view, newProgress);
            }
            private void openDialog(int newProgress) {
                if(dialog == null){
                    dialog = new ProgressDialog(WebViewActivity.this);
                    dialog.setTitle("正在拼命加载中......");
                    dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                    dialog.setProgress(newProgress);
                    dialog.show();
                }else{
                    dialog.setProgress(newProgress);
                }
            }
            private void closeDialog() {
                dialog.dismiss();
            }
        });
        //设置缓存---------------
     webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
        fangWen.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //利用webView打开网页需要重写shouldOverrideUrlLoading方法--------
                webView.loadUrl("http://"+wangZhi.getText().toString());
                webView.setWebViewClient(new WebViewClient(){
                    @Override
                    public boolean shouldOverrideUrlLoading(WebView view, String url) {
                        view.loadUrl(url);
                        return true;
                    }
                });
            }
        });
    }
    //物理返回按键事件--------------
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_BACK){
            if(webView.canGoBack()){
                webView.goBack();
                return true;
            }else{
                System.exit(0);
            }
        }
        return super.onKeyDown(keyCode, event);
    }
}