Android自定义Dialog原理实例解析

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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;
      }
    }

  };

}

public static void Exit(final Context context) {
    final ConfirmDialog cOnfirmDialog= new ConfirmDialog(context, "确定要退出吗&＃63;", "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();
      }
    });
  }