WebviewActivity.java

package io.github.scarletsky.bangumi.ui.activities;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import com.rey.material.widget.ProgressView;

import io.github.scarletsky.bangumi.R;
import io.github.scarletsky.bangumi.api.BangumiApi;
import io.github.scarletsky.bangumi.utils.ToastManager;

/**
 * Created by scarlex on 15-7-15.
 */
public class WebviewActivity extends AppCompatActivity {

    private WebView mWebview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_webview);

        mWebview = (WebView) findViewById(R.id.webview);
        final ProgressView mProgress = (ProgressView) findViewById(R.id.progress);

        WebSettings settings = mWebview.getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setSupportZoom(false);
        settings.setBuiltInZoomControls(false);

        mWebview.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }


            @Override
            public void onReceivedError(WebView view, int errorCode,
                                        String description, String failingUrl) {
                ToastManager.show(WebviewActivity.this, description);
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
            }
        });

        mWebview.setWebChromeClient(new WebChromeClient() {
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                if (newProgress == 100) {
                    mProgress.setVisibility(View.GONE);
                } else {
                    if (mProgress.getVisibility() == View.GONE) {
                        mProgress.setVisibility(View.VISIBLE);
                    }
                    mProgress.setProgress((float) (newProgress / 100.0));
                }
            }
        });

        String subjectUrl = getIntent().getStringExtra("subjectUrl");
        if (subjectUrl != null) {
            mWebview.loadUrl(subjectUrl);
        } else {
            mWebview.loadUrl(BangumiApi.URL_RAKUEN);
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebview.canGoBack()) {
            mWebview.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

}