CommonWebView.java

package io.bxbxbai.zhuanlan.widget;

import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.util.AttributeSet;
import android.webkit.WebSettings;
import android.webkit.WebView;

/**
 * Created by xuebin on 15/9/23.
 */
public class CommonWebView extends WebView {

    public static final String ENCODING_UTF_8 = "UTF-8";
    public static final String MIME_TYPE = "text/html";

    public CommonWebView(Context context) {
        super(context);
        init();
    }

    public CommonWebView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CommonWebView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public CommonWebView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init();
    }

    private void init() {
        if (isInEditMode()) {
            return;
        }
        WebSettings settings = getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setBuiltInZoomControls(false);
        //设置缓存模式
        settings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
        //开启DOM storage API功能
        settings.setDomStorageEnabled(true);
        //开启database storage 功能
        settings.setDatabaseEnabled(true);

        String cacheDir = getContext().getFilesDir().getAbsolutePath() + "web_cache";
        settings.setAppCachePath(cacheDir);
        settings.setAppCacheEnabled(true);

        settings.setLoadsImagesAutomatically(true);
        settings.setDefaultTextEncodingName(ENCODING_UTF_8);
        settings.setBlockNetworkImage(false);
        settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);
        settings.setUseWideViewPort(true);
        settings.setLoadWithOverviewMode(true);
        setHorizontalScrollBarEnabled(false);
    }
}