启用WebView android中的缩放

我无法在Android 中启用WebView上的缩放钳

我是编程新手，已经尝试了所有的东西，但无法解决问题。

作为新来的人，我不能附上图片。

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;
            }   
        });
    }

主要活动.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);
            }
        });
    }
}

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

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

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

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");
  }
}

webView.getSettings().setBuiltInZoomControls(true); 

webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setDisplayZoomControls(false);

mWebView = (WebView) findViewById(R.id.webView);
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setUseWideViewPort(true);
webSettings.setLoadWithOverviewMode(true);
webSettings.setBuiltInZoomControls(true);
mWebView.getSettings().setBuiltInZoomControls(true);
mWebView.getSettings().setDisplayZoomControls(true);
mWebView.setInitialScale(400); // zoom x4 (400%)
mWebView.getSettings().setLoadWithOverviewMode(true);
mWebView.getSettings().setUseWideViewPort(true);