我在android中的自定义对话框有一个问题，我在android中使用javainterface创建了自定义对话框，在我的类CustomizeDialog中我有一个线程在后台执行一些处理，之后我为这个自定义对话框设置了一个imgae我设置了OnPostExecute 中的图像，但出现以下错误
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
我知道我们无法从另一个线程访问主 ui，但我们在 OnPostExecuted 中访问主 ui 在我的情况下也不起作用，在我的另一个类（main.class）中，我将调用这个类
CustomizeDialog customizeDialog = new CustomizeDialog(mContext);
customizeDialog.show();
这是我创建对话框的代码
public class CustomizeDialog extends Dialog implements OnClickListener {
Button okButton;
ImageView img = null;
ImageView img2=null;
ImageView img3 = null;
ImageView img4= null;
Bitmap bm;
public CustomizeDialog(Context context) {
super(context);
img2 = (ImageView) findViewById(R.id.imageView1);
img3 = (ImageView) findViewById(R.id.imageView3);
img4 = (ImageView) findViewById(R.id.imageView4);
WindowManager.LayoutParams params = getWindow().getAttributes();
params.x = 30;
params.height = 500;
params.width = 500;
params.y = 50;
this.getWindow().setAttributes(params);
setContentView(R.layout.test);
img = (ImageView) findViewById(R.id.imageView2);
img.setBackgroundResource(R.drawable.sample);
AnimationDrawable frameAnimation = (AnimationDrawable) img.getBackground();
//Start the animation (looped playback by default).
frameAnimation.start();
new LongOperation1(context).execute("");
}
else
{
Toast toast = Toast.makeText(getContext(), "Erorr",
Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
toast.show();
} }
private class LongOperation1 extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
//here i do some process
return "Executed";
}
@Override
protected void onPostExecute(String result) {
// here i do some process to get bm
img2.setImageBitmap(bm);
}
@Override
protected void onPreExecute() {
}
@Override
protected void onProgressUpdate(String... values) {
}
}
AndroidHTMLActivity 类
package com.example.hellogap;
import com.example.javainterface.R;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.view.Gravity;
import android.webkit.WebView;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class AndroidHTMLActivity extends Activity {
WebView myBrowser;
private static final int TEXT_ID = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myBrowser = (WebView)findViewById(R.id.mybrowser);
myBrowser.addJavascriptInterface(new MyJavaScriptInterface(this), "AndroidFunction");
myBrowser.getSettings().setJavaScriptEnabled(true);
myBrowser.loadUrl("file:///android_asset/mypage.html");
}
public class MyJavaScriptInterface {
Context mContext;
MyJavaScriptInterface(Context c) {
mContext = c;
}
public void showToast(String toast){
Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
}
public void openAndroidDialog(){
//CustomizeDialog.this.img2.setImageBitmap(bm);
CustomizeDialog customizeDialog = new CustomizeDialog(AndroidHTMLActivity.this);
customizeDialog.show();
}
}
}
测试.xml
<AbsoluteLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/widget0"
android:layout_width="500dp"
android:layout_height="520dp"
android:background="@drawable/bg"
android:clickable="false" >
<ImageView
android:id="@+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="193dp"
android:layout_y="315dp"
android:src="@drawable/fb" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="51dp"
android:layout_y="318dp"
android:src="@drawable/fa" />
<ImageView
android:id="@+id/imageView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="335dp"
android:layout_y="316dp"
android:src="@drawable/fc" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="200dp"
android:layout_height="204dp"
android:layout_x="298dp"
android:layout_y="91dp" />
</AbsoluteLayout>
主要的.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<WebView
android:id="@+id/mybrowser"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</LinearLayout>
我的页面.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width; user-scalable=0;" />
<title>My HTML</title>
</head>
<body>
<h1>MyHTML</h1>
<input type="button" value="Say hello" onClick="showAndroidToast('Hello Android!')" />
<script type="text/javascript">
function showAndroidToast(toast) {
AndroidFunction.showToast(toast);
}
</script>
<input type="button" value="Open Dialog" onClick="openAndroidDialog()" />
<script type="text/javascript">
function openAndroidDialog() {
AndroidFunction.openAndroidDialog();
}
</script>
</body>
</html>
有没有人知道如何做到这一点