自定义Loading Dialog

好久没有更新blog,这段时间忙着换工作的事情,现在赶紧的拾掇起来:)
今天总结了个旋转的Loading效果的小知识点,速度写上来:
还是传统的贴代码:
这个类就是简单的布局一个View显示loading效果.
CustomerLoading.java:

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);
		mLoad = (LinearLayout) findViewById(R.id.mLoad);
		mLoad.setGravity(android.view.Gravity.CENTER);

		LoadingView mLoadView = new LoadingView(this);
		mLoadView.setDrawableResId(R.drawable.icon10);
		mLoad.addView(mLoadView);
		TextView alert = new TextView(this);
		alert.setText("加载中...");
		mLoad.addView(alert);
		ViewHandler.creteProgressDialog(this, "loading");
	}
}

这个类应该是这个知识点的重点,通过一个Timer来重画View图像,达到转动效果.
LoadingView.java:

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();
			myHandler.sendEmptyMessageDelayed(msg.what, 20);
		};
	};
}

这个类主要是实现一个ProgressDialog效果的进度条框.
ViewHandler.java:

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;
	}

}

最后为了照顾某些懒人,附上工程: