自定義Android LoadingDialog

    看慣了系統自帶的Dialog的同學們可以試著嘗試自己做一個LoadingDialog。
效果圖：


代碼如下：
CustomerLoading.java

package com.eric;
import android.app.Activity;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.TextView;

public class CustomerLoading extends Activity {
private LinearLayout mLoad;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ViewHandler.creteProgressDialog(this, "loading");
}
}</pre></strong></span> 
  這個類應該是這個知識點的重點,重畫View圖像,達到轉動效果.
 LoadingView.java: 
package com.eric;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.View;

public class LoadingView extends View {
private Matrix mFgMatrix;
private Bitmap mFgBitmap;
public LoadingView(Context context) {
super(context);
}
public LoadingView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setDrawableResId(int iconResId) {
mFgMatrix = new Matrix();
mFgBitmap = BitmapFactory.decodeResource(getResources(), iconResId);
myHandler.sendEmptyMessage(0);
onMeasure(mFgBitmap.getWidth(), mFgBitmap.getHeight());
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(mFgBitmap.getWidth(), mFgBitmap.getHeight());
package com.eric;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.View;
public class LoadingView extends View {
private Matrix mFgMatrix;
private Bitmap mFgBitmap;
public LoadingView(Context context) {
super(context);
}
public LoadingView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setDrawableResId(int iconResId) {
mFgMatrix = new Matrix();
mFgBitmap = BitmapFactory.decodeResource(getResources(), iconResId);
myHandler.sendEmptyMessage(0);
onMeasure(mFgBitmap.getWidth(), mFgBitmap.getHeight());
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(mFgBitmap.getWidth(), mFgBitmap.getHeight());
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawBitmap(mFgBitmap, mFgMatrix, null);
}
private Handler myHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
mFgMatrix.postRotate(-10f, mFgBitmap.getWidth() / 2f, mFgBitmap
.getHeight() / 2f);
invalidate();//更新視圖
myHandler.sendEmptyMessageDelayed(msg.what, 20);
};
};
}
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawBitmap(mFgBitmap, mFgMatrix, null);
}
private Handler myHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
mFgMatrix.postRotate(-10f, mFgBitmap.getWidth() / 2f, mFgBitmap
.getHeight() / 2f);
invalidate();//更新視圖
myHandler.sendEmptyMessageDelayed(msg.what, 20);
};
};
}</pre></strong></span> 
  這個類主要是實現一個ProgressDialog效果的進度條框. 
 ViewHandler.java: 
package com.eric;
import android.app.ProgressDialog;
import android.content.Context;
import android.widget.LinearLayout;
import android.widget.TextView;
public class ViewHandler {
public static ProgressDialog creteProgressDialog(Context context,
String text) {
final ProgressDialog dlg = new ProgressDialog(context);
dlg.show();
dlg.setContentView(R.layout.loading);
LinearLayout root = (LinearLayout) dlg
.findViewById(R.id.progressDialog);
root.setGravity(android.view.Gravity.CENTER);

LoadingView mLoadView = new LoadingView(context);
mLoadView.setDrawableResId(R.drawable.icon10);
root.addView(mLoadView);
TextView alert = new TextView(context);
alert.setText(text);
root.addView(alert);
return dlg;
}
}</pre></strong></span>