Android之Dialog详解(二)：自定义对话框

上一篇讲解了Android的四大对话框形式，今天我们来讲解第五种形式，自定义，也是最牛逼的。有没有很激动？

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实现自定义对话框的步骤

1、先自定义一个对话框样式

2、创建一个ConfirmDialog类，继承Dialog类，实现里面方法，在里面创建自定义样式的弹出框。

package com.corn.widget;

import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;

import com.corn.R;

public class ConfirmDialog extends Dialog {

    private Context context;
    private String title;
    private String confirmButtonText;
    private String cacelButtonText;
    private ClickListenerInterface clickListenerInterface;

    public interface ClickListenerInterface {

        public void doConfirm();

        public void doCancel();
    }

    public ConfirmDialog(Context context, String title, String confirmButtonText, String cacelButtonText) {
        super(context, R.style.MyDialog);
        this.context = context;
        this.title = title;
        this.confirmButtonText = confirmButtonText;
        this.cacelButtonText = cacelButtonText;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

        init();
    }

    public void init() {
        LayoutInflater inflater = LayoutInflater.from(context);
        View view = inflater.inflate(R.layout.confirm_dialog, null);
        setContentView(view);

        TextView tvTitle = (TextView) view.findViewById(R.id.title);
        TextView tvConfirm = (TextView) view.findViewById(R.id.confirm);
        TextView tvCancel = (TextView) view.findViewById(R.id.cancel);

        tvTitle.setText(title);
        tvConfirm.setText(confirmButtonText);
        tvCancel.setText(cacelButtonText);

        tvConfirm.setOnClickListener(new clickListener());
        tvCancel.setOnClickListener(new clickListener());

        Window dialogWindow = getWindow();
        WindowManager.LayoutParams lp = dialogWindow.getAttributes();
        DisplayMetrics d = context.getResources().getDisplayMetrics(); // 获取屏幕宽、高用
        lp.width = (int) (d.widthPixels * 0.8); // 高度设置为屏幕的0.6
        dialogWindow.setAttributes(lp);
    }

    public void setClicklistener(ClickListenerInterface clickListenerInterface) {
        this.clickListenerInterface = clickListenerInterface;
    }

    private class clickListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            int id = v.getId();
            switch (id) {
            case R.id.confirm:
                clickListenerInterface.doConfirm();
                break;
            case R.id.cancel:
                clickListenerInterface.doCancel();
                break;
            }
        }

    };

}

3、在需要使用此控件的地方，进行如下形式调用：

public static void Exit(final Context context) {
        final ConfirmDialog confirmDialog = new ConfirmDialog(context, "确定要退出吗?", "退出", "取消");
        confirmDialog.show();
        confirmDialog.setClicklistener(new ConfirmDialog.ClickListenerInterface() {
            @Override
            public void doConfirm() {
                // TODO Auto-generated method stub
                confirmDialog.dismiss();
                //toUserHome(context);
                AppManager.getAppManager().AppExit(context);
            }

            @Override
            public void doCancel() {
                // TODO Auto-generated method stub
                confirmDialog.dismiss();
            }
        });
    }

调用中实现了此控件的内部接口，并赋给控件本身，以此在点击按钮时实现基于外部具体业务逻辑的函数回调。到此自定义对话框就完成了。