Android WebView的使用方法总结

<?xml version="1.0" encoding="utf-8"? 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:my="http://schemas.android.com/apk/res-auto"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@color/activity_main_bg"
  android:orientation="vertical" 

  <com.eloancn.borrower.common.widget.TitleView
    android:id="@+id/titleView"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    my:titleText="H5" / 

  <RelativeLayout
    android:id="@+id/rl_webViewContainer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 

    <!--在代码中添加webView防止内存泄露隐患-- 

    <LinearLayout
      android:id="@+id/neterror_tip"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:gravity="center_horizontal"
      android:visibility="gone" 

      <ImageView
        android:layout_marginTop="110dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/not_found" / 

    </LinearLayout 

  </RelativeLayout 
</LinearLayout 

public class CommonWebViewActivity extends Activity { 
private WebView mWebView; 
private TitleView mTitleView; 
private RelativeLayout mWebViewContainer; 
private String title; 
private String url; 
private LinearLayout neterrorLayout; 
private int mFlag;  //来源 
public static final int FLAG_SIGNATURE = 1; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_common_webview_main); 
initData(); 
initView(); 
setData(); 
} 
@Override 
protected void onDestroy() { 
super.onDestroy(); 
mWebView.setWebViewClient(null); 
mWebView.setWebChromeClient(null); 
mWebViewContainer.removeView(mWebView); 
mWebView.removeAllViews(); 
mWebView.destroy(); 
} 
private void initData() { 
url = getIntent().getStringExtra("url"); 
title = getIntent().getStringExtra("title"); 
mFlag = getIntent().getIntExtra("flag", 0); 
} 
private void initView() { 
mTitleView = (TitleView) findViewById(R.id.titleView); 
mWebViewContainer = (RelativeLayout) findViewById(R.id.rl_webViewContainer); 
neterrorLayout = (LinearLayout) findViewById(R.id.neterror_tip); 
mWebView = new WebView(getApplicationContext()); 
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams( 
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT); 
mWebViewContainer.addView(mWebView, layoutParams); 
WebSettings webSettings = mWebView.getSettings(); 
//设置WebView属性，能够执行Javascript脚本 
webSettings.setJavaScriptEnabled(true); 
//设置可以访问文件 
webSettings.setAllowFileAccess(true); 
//设置支持缩放 
webSettings.setBuiltInZoomControls(false); 
//允许js弹出窗口 
webSettings.setJavaScriptCanOpenWindowsAutomatically(true); 
mTitleView.setLeftBtnClickListener(new TitleView.OnBtnClickListener() { 
@Override 
public void onClick(View v) { 
if (mWebView.canGoBack()) { 
mWebView.goBack(); 
} else { 
finish(); 
} 
} 
}); 
} 
@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
if (keyCode == KeyEvent.KEYCODE_BACK) { 
if (mWebView.canGoBack()) { 
mWebView.goBack(); 
return true; 
} 
} 
return super.onKeyDown(keyCode, event); 
} 
private void setData() { 
mTitleView.setTitle(title); 
mWebView.loadUrl(url); 
mWebView.setWebChromeClient(new WebChromeClient(){ 
@Override 
public boolean onJsAlert(WebView view, String url, final String message, final JsResult result) { 
//注意，WebView默认不会显示JavaScript的Alert，需要Android实现。 
runOnUiThread(new Runnable() { 
@Override 
public void run() { 
//自定义美观的Dialog，仅仅是为了显示message 
CustomDialog.Builder builder = new CustomDialog.Builder(CommonWebViewActivity.this); 
builder.setTitle("提示"); 
builder.setMessage(message); 
builder.setSingle("知道了", new DialogInterface.OnClickListener() { 
@Override 
public void onClick(DialogInterface dialogInterface, int i) { 
dialogInterface.dismiss(); 
} 
}); 
builder.create().show(); 
} 
}); 
result.confirm();//这里必须调用，否则页面会阻塞造成假死 
return true; 
} 
@Override 
public void onReceivedTitle(final WebView view, final String title) { 
super.onReceivedTitle(view, title); 
if (FLAG_SIGNATURE == mFlag) { 
runOnUiThread(new Runnable() { 
@Override 
public void run() { 
mTitleView.setTitle(title); 
} 
}); 
} 
} 
}); 
mWebView.setWebViewClient(new WebViewClient() { 
@Override 
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) { 
if (FLAG_SIGNATURE == mFlag) { 
Log.d("brycegao", "shouldInterceptRequest url:" + request.getUrl().toString()); 
if (request.getUrl().toString().contains("wxd://getImage?tenderid=")) { 
//可以通过url传值给Android， 即在url里放置想要的参数 
runOnUiThread(new Runnable() { 
@Override 
public void run() { 
setResult(RESULT_OK); 
finish(); 
} 
}); 
} 
} 
return super.shouldInterceptRequest(view, request); 
} 
@Override 
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) { 
mWebView.loadUrl(url); 
return true; 
} 
@Override 
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) { 
super.onReceivedError(view, request, error); 
if (FLAG_SIGNATURE == mFlag 
&& request.getUrl().toString().contains("wxd://getImage?tenderid=")) { 
//do nothing 
mWebView.setVisibility(View.GONE); //优化体验，避免显示错误信息 
} else { 
//加载失败 
neterrorLayout.setVisibility(View.VISIBLE); 
mWebView.setVisibility(View.GONE); 
} 
} 
}); 
neterrorLayout.setOnClickListener(new View.OnClickListener() { 
@Override 
public void onClick(View view) { 
mWebView.setVisibility(View.VISIBLE); 
neterrorLayout.setVisibility(View.GONE); 
mWebView.loadUrl(url); 
} 
}); 
} 
}