Android 自定义LoadingDialog

jopen 12年前

  看惯了系统自带的Dialog的同学们可以试着尝试自己做一个LoadingDialog。
效果图：
Android 自定义LoadingDialog

代码如下：
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");        }        }
这个类应该是这个知识点的重点,重画View图像,达到转动效果.
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();//更新视图        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();//更新视图        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: 
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;        }        }