Enable zoom in WebView android

Question

I can not enable the zoom clamp on WebView in Android

I am new to programming, already tried everything and can not solve the problem.

Being new here , I can not attach image.

WebViewActivity.java

package com.mkyong.android;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;


public class WebViewActivity extends Activity {

    private WebView webView;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.webview);

        webView = (WebView) findViewById(R.id.webView1);
        webView.getSettings().setBuiltInZoomControls(true);
        webSettings.setSupportZoom(true);
        webView.getSettings().setLoadWithOverviewMode(true);
        webView.getSettings().setUseWideViewPort(true);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.loadUrl("http://200.99.150.163/sacsptrans/hrecinicial.aspx");


        webView.setWebViewClient(new WebViewClient()
        {
                        // prevent open in external browser
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url)
            {
                return false;
            }   

        });

    }

MainActivity.java

package com.mkyong.android;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

    private Button button;

    public void onCreate(Bundle savedInstanceState) {
        final Context context = this;

        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        button = (Button) findViewById(R.id.buttonUrl);

        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Intent intent = new Intent(context, WebViewActivity.class);
                startActivity(intent);
            }

        });

    }

}

Answer 1

In order to enable zoom on the webView, add the following code in onTuchEvent override method:

webview.getSettings().setBuiltInZoomControls(true);
webview.getSettings().setSupportZoom(true);

If your webview goes to another url and you want to mantain the zoom level use the webSettings class

webview.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);

If you want a pre-defined zoom when webview loads use:

mWebView.setInitialScale(ZOOM_LEVEL);  // int value 50 = 50% -- 200 = 200%

It works pretty well for all device resolutions.

UPDATE: If any of those are working (weeeird...) try this:

public class Main extends Activity {
  private WebView myWebView;
  private static final FrameLayout.LayoutParams ZOOM_PARAMS = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT,Gravity.BOTTOM);

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setContentView(R.layout.webview);
    this.myWebView = (WebView) this.findViewById(R.id.webView);

    FrameLayout mContentView = (FrameLayout) getWindow().
    getDecorView().findViewById(android.R.id.content);
    final View zoom = this.myWebView.getZoomControls();
    mContentView.addView(zoom, ZOOM_PARAMS);
    zoom.setVisibility(View.GONE);

    this.myWebView.loadUrl("http://www.facebook.com");
  }
}

From this question.