android - How to enable WebView zoom

activity_main.xml

 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:id="@+id/rl"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:padding="10dp"     tools:context=".MainActivity"     android:background="#fcfdfb"     >     <WebView         android:id="@+id/web_view"         android:layout_width="match_parent"         android:layout_height="match_parent"         /> </RelativeLayout> 

MainActivity.java

 package com.cfsuman.me.androidcodesnippets;  import android.app.Activity; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Window; import android.webkit.WebChromeClient; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.RelativeLayout;   public class MainActivity extends AppCompatActivity {     private Context mContext;     private Activity mActivity;      private RelativeLayout mRelativeLayout;     private WebView mWebView;      private String mUrl="https://www.google.com";      @Override     protected void onCreate(Bundle savedInstanceState) {         // Request window feature action kafetaria         requestWindowFeature(Window.FEATURE_ACTION_BAR);         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          // Get the application context         mContext = getApplicationContext();         // Get the activity         mActivity = MainActivity.this;          // Change the action kafetaria color         getSupportActionBar().setBackgroundDrawable(                 new ColorDrawable(Color.parseColor("#FF4E8C0F"))         );          // Get the widgets reference from XML layout         mRelativeLayout = (RelativeLayout) findViewById(R.id.rl);         mWebView = (WebView) findViewById(R.id.web_view);          // Request to render the web page         renderWebPage(mUrl);     }      // Custom method to render a web page     protected void renderWebPage(String urlToRender){         mWebView.setWebViewClient(new WebViewClient() {             @Override             public void onPageStarted(WebView view, String url, Bitmap favicon) {                 // Do something on page loading started             }              @Override             public void onPageFinished(WebView view, String url) {                 // Do something when page loading finished             }         });          mWebView.setWebChromeClient(new WebChromeClient() {             public void onProgressChanged(WebView view, int newProgress) {             }         });          /*             WebSettings                 Manages settings state for a WebView. When a WebView is first created, it obtains a                 set of default settings. These default settings will be returned from any getter                 call. A WebSettings object obtained from WebView.getSettings() is tied to the life                 of the WebView. If a WebView has been destroyed, any method call on WebSettings                 will throw an IllegalStateException.         */         // Enable the javascript         mWebView.getSettings().setJavaScriptEnabled(true);          /*             public abstract void setSupportZoom (boolean support)                 Sets whether the WebView should support zooming using its on-screen zoom controls                 and gestures. The particular zoom mechanisms that should be used can be set with                 setBuiltInZoomControls(boolean). This setting does not affect zooming performed                 using the zoomIn() and zoomOut() methods. The default is true.              Parameters                 support : whether the WebView should support zoom          */         mWebView.getSettings().setSupportZoom(true);          /*             public abstract void setBuiltInZoomControls (boolean enabled)                 Sets whether the WebView should use its built-in zoom mechanisms. The built-in zoom                 mechanisms comprise on-screen zoom controls, which are displayed over the WebView's                 content, and the use of a pinch gesture to control zooming. Whether or not these                 on-screen controls are displayed can be set with setDisplayZoomControls(boolean).                 The default is false.                  The built-in mechanisms are the only currently supported zoom mechanisms, so it is                 recommended that this setting is always enabled.              Parameters                 enabled : whether the WebView should use its built-in zoom mechanisms         */         mWebView.getSettings().setBuiltInZoomControls(true);          /*             public abstract void setDisplayZoomControls (boolean enabled)                 Sets whether the WebView should display on-screen zoom controls when using the                 built-in zoom mechanisms. The default is true.              Parameters                 enabled : whether the WebView should display on-screen zoom controls         */         mWebView.getSettings().setDisplayZoomControls(true);          // Render the web page         mWebView.loadUrl(urlToRender);     } }