xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" app:theme="@style/ThemeOverlay.AppCompat.Light" /> </android.support.design.widget.AppBarLayout> <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent"> <WebView android:id="@+id/web_view" android:layout_width="match_parent" android:layout_height="match_parent" /> <ProgressBar android:id="@+id/progress_bar" android:layout_width="50dp" android:layout_height="50dp" android:layout_gravity="center" android:visibility="gone" /> </FrameLayout> </LinearLayout>
MainActivity
public class MainActivity extends AppCompatActivity { private WebView mWebView; private ProgressBar mProgressbar; private Toolbar mToolbar; @Override protected void onCreate(Bundle savedInstanceState) { supportRequestWindowFeature(Window.FEATURE_NO_TITLE); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initAppBar();//初始化Toolbar initWebView();//初始化WebView initWebSettings();//初始化WebSettings initWebViewClient();//初始化WebViewClient initWebChromeClient();//初始化WebChromeClient } private void initAppBar() { mToolbar = (Toolbar) findViewById(R.id.toolbar); mToolbar.setTitle("载入中.."); mToolbar.setTitleTextColor(getResources().getColor(R.color.colorWhite)); setSupportActionBar(mToolbar); getSupportActionBar().setDisplayHomeAsUpEnabled(false); } private void initWebView() { mWebView = (WebView) findViewById(R.id.web_view); mProgressbar = (ProgressBar) findViewById(R.id.progress_bar); String url = "https://www.google.com"; mWebView.loadUrl(url); } private void initWebSettings() { WebSettings settings = mWebView.getSettings(); //支持获取手势焦点 mWebView.requestFocusFromTouch(); //支持JS settings.setJavaScriptEnabled(true); //支持插件 settings.setPluginState(WebSettings.PluginState.ON); //设置适应屏幕 settings.setUseWideViewPort(true); settings.setLoadWithOverviewMode(true); //支持缩放 settings.setSupportZoom(false); //隐藏原生的缩放控件 settings.setDisplayZoomControls(false); //支持内容重新布局 settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN); settings.supportMultipleWindows(); settings.setSupportMultipleWindows(true); //设置缓存模式 settings.setDomStorageEnabled(true); settings.setDatabaseEnabled(true); settings.setCacheMode(WebSettings.LOAD_DEFAULT); settings.setAppCacheEnabled(true); settings.setAppCachePath(mWebView.getContext().getCacheDir().getAbsolutePath()); //设置可访问文件 settings.setAllowFileAccess(true); //当webview调用requestFocus时为webview设置节点 settings.setNeedInitialFocus(true); //支持自动加载图片 if (Build.VERSION.SDK_INT >= 19) { settings.setLoadsImagesAutomatically(true); } else { settings.setLoadsImagesAutomatically(false); } settings.setNeedInitialFocus(true); //设置编码格式 settings.setDefaultTextEncodingName("UTF-8"); } private void initWebViewClient() { mWebView.setWebViewClient(new WebViewClient() { //页面开始加载时 @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { super.onPageStarted(view, url, favicon); mProgressbar.setVisibility(View.VISIBLE); } //页面完成加载时 @Override public void onPageFinished(WebView view, String url) { super.onPageFinished(view, url); mProgressbar.setVisibility(View.GONE); } //是否在WebView内加载新页面,可以在这里判断URL做相应操作 @Override public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) { view.loadUrl(request.toString()); return true; } //网络错误时回调的方法 @Override public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) { super.onReceivedError(view, request, error); /** * 在这里写网络错误时的逻辑,比如显示一个错误页面 * * * */ } @TargetApi(Build.VERSION_CODES.M) @Override public void onReceivedHttpError(WebView view, WebResourceRequest request, WebResourceResponse errorResponse) { super.onReceivedHttpError(view, request, errorResponse); } }); } private void initWebChromeClient() { mWebView.setWebChromeClient(new WebChromeClient() { private Bitmap mDefaultVideoPoster;//默认的视频展示图 @Override public void onReceivedTitle(WebView view, String title) { super.onReceivedTitle(view, title); setToolbarTitle(title); } @Override public Bitmap getDefaultVideoPoster() { if (mDefaultVideoPoster == null) { mDefaultVideoPoster = BitmapFactory.decodeResource( getResources(), R.drawable.video_default ); return mDefaultVideoPoster; } return super.getDefaultVideoPoster(); } }); } /** * 设置Toolbar标题 * * @param title */ private void setToolbarTitle(final String title) { Log.d("setToolbarTitle", " WebDetailActivity " + title); if (mToolbar != null) { mToolbar.post(new Runnable() { @Override public void run() { mToolbar.setTitle(TextUtils.isEmpty(title) ? getString(R.string.loading) : title); } }); } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.page_up: Toast.makeText(getApplicationContext(), "页面向上", Toast.LENGTH_SHORT).show(); mWebView.pageUp(true); break; case R.id.page_down: Toast.makeText(getApplicationContext(), "页面向下", Toast.LENGTH_SHORT).show(); mWebView.pageDown(true); break; case R.id.refresh: Toast.makeText(getApplicationContext(), "刷新~", Toast.LENGTH_SHORT).show(); mWebView.reload(); default: return super.onOptionsItemSelected(item); } return super.onOptionsItemSelected(item); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { //如果按下的是回退键且历史记录里确实还有页面 if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) { mWebView.goBack(); return true; } else { Toast.makeText(getApplicationContext(), "OVER!", Toast.LENGTH_LONG).show(); } return super.onKeyDown(keyCode, event); } }
WebView加载js方法
String commandClick="(function(){ " + "document.getElementById('userId').value='"+ EmailBase.getUserId()+"' ; " + "})()"; webView.loadUrl("javascript: "+commandClick);