Android自己定义提示框

在开发中，假设感觉系统自带的提示框不好看，开发人员能够自定义提示框的样式。主要是继承Dialog

程序文件夹结构

关键代码

package com.dzt.custom.dialog;

import android.app.Dialog;

import android.content.Context;

import android.content.res.Resources;

import android.util.DisplayMetrics;

import android.view.Gravity;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import android.widget.TextView;

/**

 * 自己定义对话框

 *

 *

 */

public class CustomDialog extends Dialog implements

		android.view.View.OnClickListener {

	private static int default_width = 400; // 默认宽度

	private static int default_height = 200;// 默认高度

	private static String mShowText = null;

	private TextView mText = null;

	public CustomDialog(Context context) {

		super(context);

	}

	public CustomDialog(Context context, int layout, int style, String msg) {

		this(context, default_width, default_height, layout, style, msg);

	}

	public CustomDialog(Context context, int width, int height, int layout,

			int style, String msg) {

		super(context, style);

		// 设置内容

		setContentView(layout);

		mShowText = msg;

		initWidgets();

		// 设置窗体属性

		Window window = getWindow();

		WindowManager.LayoutParams params = window.getAttributes();

		// 设置宽度、高度、密度、对齐方式

		float density = getDensity(context);

		params.width = (int) (width * density);

		params.height = (int) (height * density);

		params.gravity = Gravity.CENTER;

		window.setAttributes(params);

	}

	@Override

	protected void onStop() {

		// TODO Auto-generated method stub

		super.onStop();

		System.out.println("stop");

	}

	/**

	 * 初始化提示框中的控件

	 */

	private void initWidgets() {

		CustomImageButton btn = (CustomImageButton) findViewById(R.id.btn_ok);

		btn.setOnClickListener(this);

		btn = (CustomImageButton) findViewById(R.id.btn_cancel);

		btn.setOnClickListener(this);

		mText = (TextView) findViewById(R.id.dlg_tv_text);

		mText.setText(mShowText);

	}

	/**

	 * 获取显示密度

	 *

	 * @param context

	 * @return

	 */

	public float getDensity(Context context) {

		Resources res = context.getResources();

		DisplayMetrics dm = res.getDisplayMetrics();

		return dm.density;

	}

	@Override

	public void onClick(View v) {

		// TODO Auto-generated method stub

		switch (v.getId()) {

		case R.id.btn_ok:

			if (listener != null)

				listener.onClickOk();

			System.out.println("you click ok button---------");

			break;

		case R.id.btn_cancel:

			if (listener != null)

				listener.onClickCancel();

			System.out.println("you click cancel button-------");

			break;

		default:

			break;

		}

	}

	public void setOnClickBtnListener(OnClickBtnListener listener) {

		this.listener = listener;

	}

	private OnClickBtnListener listener = null;

	public interface OnClickBtnListener {

		public void onClickOk();

		public void onClickCancel();

	}

}

在提示框中对两个按钮设置了监听器。按钮也是自己定义的

package com.dzt.custom.dialog;

import android.content.Context;

import android.content.res.TypedArray;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.Paint.Align;

import android.util.AttributeSet;

import android.util.Log;

import android.widget.ImageButton;

/**

 * 自己定义ImageButton 能够在ImageButton上面设置文字

 */

public class CustomImageButton extends ImageButton {

	private static final String TAG = "CustomImageButton_dzt";

	private String mtext = "";

	private int mcolor = 0;

	private float mtextsize = 0f;

	private Paint mpatin;

	public CustomImageButton(Context context, AttributeSet attrs) {

		super(context, attrs);

		initAttrs(attrs);

	}

	private void initAttrs(AttributeSet attrs) {

		TypedArray array = getContext().obtainStyledAttributes(attrs,

				R.styleable.CustomButtonAttrs);

		mtext = array.getString(R.styleable.CustomButtonAttrs_textValue);

		mcolor = array.getColor(R.styleable.CustomButtonAttrs_textColor, 230);

		mtextsize = array.getDimension(R.styleable.CustomButtonAttrs_textSize,

				25.0f);

		array.recycle(); // 回收资源

		mpatin = new Paint();

		mpatin.setTextAlign(Align.CENTER);

		Log.d(TAG, "mtextsize = " + mtextsize);

	}

	public void setText(String text) {

		this.mtext = text;

	}

	public void setColor(int color) {

		this.mcolor = color;

	}

	public void setTextSize(float textsize) {

		this.mtextsize = textsize;

	}

	@Override

	protected void onDraw(Canvas canvas) {

		super.onDraw(canvas);

		mpatin.setColor(mcolor);

		mpatin.setTextSize(mtextsize);

		canvas.drawText(mtext, canvas.getWidth() / 2,

				(canvas.getHeight() / 2)+10, mpatin);

	}

}

在调用时也很easy

@Override

	public void onClick(View v) {

		// TODO Auto-generated method stub

		switch (v.getId()) {

		case R.id.btn_show_dialog:

			customDialog = new CustomDialog(this, R.layout.dialog_layout,

					R.style.DialogTheme, getResources().getString(

							R.string.text_show));

			customDialog.show();

			customDialog.setOnClickBtnListener(new OnClickBtnListener() {

				@Override

				public void onClickOk() {

					// TODO Auto-generated method stub

					System.out.println("you click ok button");

					// 处理点击OK时的操作

					// ...............

					customDialog.cancel();

				}

				@Override

				public void onClickCancel() {

					// TODO Auto-generated method stub

					System.out.println("you click cancel button");

					// 处理点击Cancel时的操作

					// ...................

					customDialog.cancel();

				}

			});

			break;

		default:

			break;

		}

	}

须要源代码的能够到：http://download.csdn.net/detail/deng0zhaotai/7760615