Android开发之WebView

感觉在显示信息时，用途还可以的。

只是不知和React Native的应用场合有何分别？

package com.tw.flag.ch13_hellowebview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;

public class MainActivity extends AppCompatActivity {
    WebView wv;
    ProgressBar pb;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        wv = (WebView) findViewById(R.id.wv);
        pb = (ProgressBar)findViewById(R.id.pb);
        wv.getSettings().setJavaScriptEnabled(true);
        wv.getSettings().setBuiltInZoomControls(true);
        wv.invokeZoomPicker();
        wv.setWebViewClient(new WebViewClient());
        wv.setWebChromeClient(new WebChromeClient(){
            public void onProgressChanged(WebView view, int progress) {
                pb.setProgress(progress);
                pb.setVisibility(progress < 100 ? View.VISIBLE:
                View.GONE);
            }
        });
        wv.loadUrl("https://m.jd.com");
    }

    @Override
    public void onBackPressed() {
        if (wv.canGoBack()) {
            wv.goBack();
            return;
        }
        super.onBackPressed();
    }
}