Android 自定義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><span style="line-height:25px;font-family:Helvetica,Tahoma,Arial,sans-serif;font-size:14px;">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.<br />

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><span style="line-height:25px;font-family:Helvetica,Tahoma,Arial,sans-serif;font-size:14px;">這個類主要是實現一個ProgressDialog效果的進度條框. <br />

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><br />

</strong></span>