- package wst.webview;
- import android.annotation.SuppressLint;
- import android.app.Activity;
- import android.content.Context;
- import android.content.Intent;
- import android.graphics.Bitmap;
- import android.os.Bundle;
- import android.webkit.WebView;
- import android.webkit.WebViewClient;
- @SuppressLint("SetJavaScriptEnabled")
- public class MainActivity extends Activity {
- private WebView contentWebView = null;
- @SuppressLint("SetJavaScriptEnabled")
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- contentWebView = (WebView) findViewById(R.id.webview);
- // 啓用javascript
- contentWebView.getSettings().setJavaScriptEnabled(true);
- // 隨便找了個帶圖片的網站
- contentWebView.loadUrl("http://www.weim.me/12408.html");
- // 添加js交互接口類,並起別名 imagelistner
- contentWebView.addJavascriptInterface(new JavascriptInterface(this), "imagelistner");
- contentWebView.setWebViewClient(new MyWebViewClient());
- }
- // 注入js函數監聽
- private void addImageClickListner() {
- // 這段js函數的功能就是,遍歷所有的img幾點,並添加onclick函數,函數的功能是在圖片點擊的時候調用本地java接口並傳遞url過去
- contentWebView.loadUrl("javascript:(function(){" +
- "var objs = document.getElementsByTagName(\"img\"); " +
- "for(var i=0;i<objs.length;i++) " +
- "{"
- + " objs[i].οnclick=function() " +
- " { "
- + " window.imagelistner.openImage(this.src); " +
- " } " +
- "}" +
- "})()");
- }
- // js通信接口
- public class JavascriptInterface {
- private Context context;
- public JavascriptInterface(Context context) {
- this.context = context;
- }
- public void openImage(String img) {
- System.out.println(img);
- //
- Intent intent = new Intent();
- intent.putExtra("image", img);
- intent.setClass(context, ShowWebImageActivity.class);
- context.startActivity(intent);
- System.out.println(img);
- }
- }
- // 監聽
- private class MyWebViewClient extends WebViewClient {
- @Override
- public boolean shouldOverrideUrlLoading(WebView view, String url) {
- return super.shouldOverrideUrlLoading(view, url);
- }
- @Override
- public void onPageFinished(WebView view, String url) {
- view.getSettings().setJavaScriptEnabled(true);
- super.onPageFinished(view, url);
- // html加載完成之後,添加監聽圖片的點擊js函數
- addImageClickListner();
- }
- @Override
- public void onPageStarted(WebView view, String url, Bitmap favicon) {
- view.getSettings().setJavaScriptEnabled(true);
- super.onPageStarted(view, url, favicon);
- }
- @Override
- public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
- super.onReceivedError(view, errorCode, description, failingUrl);
- }
- }
- }
展示圖片的activity代碼
- package wst.webview;
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.URL;
- import android.app.Activity;
- import android.graphics.drawable.BitmapDrawable;
- import android.graphics.drawable.Drawable;
- import android.os.Bundle;
- import android.widget.TextView;
- public class ShowWebImageActivity extends Activity {
- private TextView imageTextView = null;
- private String imagePath = null;
- private ZoomableImageView imageView = null;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.show_webimage);
- this.imagePath = getIntent().getStringExtra("image");
- this.imageTextView = (TextView) findViewById(R.id.show_webimage_imagepath_textview);
- imageTextView.setText(this.imagePath);
- imageView = (ZoomableImageView) findViewById(R.id.show_webimage_imageview);
- try {
- imageView.setImageBitmap(((BitmapDrawable) ShowWebImageActivity.loadImageFromUrl(this.imagePath)).getBitmap());
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- public static Drawable loadImageFromUrl(String url) throws IOException {
- URL m = new URL(url);
- InputStream i = (InputStream) m.getContent();
- Drawable d = Drawable.createFromStream(i, "src");
- return d;
- }
- }
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
- <!-- TODO 默認佔位圖 -->
- <wst.webview.ZoomableImageView
- android:id="@+id/show_webimage_imageview"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:scaleType="matrix"
- android:src="@drawable/icon" />
- <TextView
- android:id="@+id/show_webimage_imagepath_textview"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:gravity="center"
- android:textColor="#ffff0000" />
- </LinearLayout>
希望對大家有所幫助