Android上 用Html5做界面，javascript调用摄像头实例
Android开发时候，界面制作基本会耗去大半部分时间，而且只能开发人员自己制作，所以一直想借用HTML5+CSS3完成，PhoneGap还不太成熟，自己准备用Android原生+WebView完成，发现和Flash As做互调差不多。以下代码是通过HTML的javascript调用原生接口，完成照片选取的代码，点击图像，将选择图片（从相机或者摄像头）。照片选取代码见上一篇文章 《Android 拍照加剪切处理方式》
Activity代码：
import sh.path.R;
import sh.path.ui.image.ImageCrop;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.Window;
import android.webkit.WebView;
import android.widget.Toast;
public class HTMLFeedHomeActivity extends Activity {
private ImageCrop photoUtil;
private WebView webView = null;
private Handler mHandler = new Handler();
private String mJsData = null;
private Activity activityThis = this;
@Override
/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.htmlfeeds);
setupWebView();
photoUtil = new ImageCrop(this);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
private void setupWebView() {
webView = (WebView) findViewById(R.id.idhtmlfeedhome);
webView.getSettings().setJavaScriptEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webView.loadUrl("file:///android_asset/path/index.html");
webView.addJavascriptInterface(new JavaScriptInterface(), "caller");
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
try{
if(photoUtil.capituredImage(requestCode, resultCode, data)){
if(ImageCrop.CROP_IMAGE ==requestCode){
//mImageView.setImageURI(photoUtil.getImageCaptureUriCutted());
webView.loadUrl("javascript:setPhoto('"+mJsData+"','"+photoUtil.getImageCaptureUriCutted().getPath()+"')");
}
return;
}
}catch(Exception exp){
exp.printStackTrace();
}
}
private class JavaScriptInterface{
@SuppressWarnings("unused")
public void clickOnAndroid() {
mHandler.post(new Runnable() {
public void run() {
webView.loadUrl("javascript:wave()");
}
});
}
@SuppressWarnings("unused")
public void takePhoto(String jsData){
mJsData = jsData;
photoUtil.getDialog().show();
}
@SuppressWarnings("unused")
public void showTip(String tip){
Toast.makeText(activityThis, tip, Toast.LENGTH_SHORT).show();
}
}
}