android AlertDialog的简单使用实例

当你的应用需要显示一个进度条或需要用户对信息进行确认时，可以使用alertDialog来完成。下面来介绍常用的四种AlertDialog。

1、普通对话框

package com.example.yk.dialogtest; 

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast; 

/**
 * AlertDialog普通对话框
 */
public class GeneralDialogActivity extends AppCompatActivity { 

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_general_dialog);
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(this)
        .setTitle("操作title")//设置title
        .setMessage("操作message")//设置要显示的message
        .setCancelable(false)//表示点击dialog其它部分不能取消(除了“取消”，“确定”按钮)
        .setPositiveButton("确定", new
            DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialogInterface, int i) {
        Toast.makeText(GeneralDialogActivity.this, "点击了确定", Toast.LENGTH_SHORT).show(); 

      }
    }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialogInterface, int i) {
//        dialogInterface.dismiss();
      }
    });
    alertDialog.show();//别忘了show
  }
}

2、单选对话框

package com.example.yk.dialogtest; 

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast; 

/**
 * 单选对话框
 */
public class SingleDialogActivity extends AppCompatActivity {
  private String[] items={"java","php","c"};
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_single_dialog);
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(this)
        .setTitle("提示title")
//        .setMessage("提示message")//在需要设置单选对话框的情况下是不能设置message的，否则单选对话框内容会失效
        .setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {//checkedItem=-1表示默认不选中
          @Override
          public void onClick(DialogInterface dialogInterface, int i) {
            Toast.makeText(SingleDialogActivity.this, "选中了"+items[i], Toast.LENGTH_SHORT).show();
          }
        }).setPositiveButton("确定", new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialogInterface, int i) { 

          }
        });
      alertDialog.show();
  }
}

3、多选对话框

package com.example.yk.dialogtest; 

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast; 

/**
 * 多选对话框
 */
public class MultiChoiceDialogActivity extends AppCompatActivity {
  private String[] items={"java","php","c"};
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_multi_choice_dialog);
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(this)
        .setTitle("提示title")
        .setCancelable(false)
        .setMultiChoiceItems(items, new boolean[]{false, false, false}, new DialogInterface.OnMultiChoiceClickListener() { 

          @Override
          public void onClick(DialogInterface dialogInterface, int i, boolean b) {
            if(b){
              Toast.makeText(MultiChoiceDialogActivity.this, "选中了"+items[i], Toast.LENGTH_SHORT)
                  .show();
            } 

          }
        })
        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialogInterface, int i) { 

          }
        });
    alertDialog.show();
  }
}

4、进度条对话框

package com.example.yk.dialogtest; 

import android.app.ProgressDialog;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle; 

/**
 * 进度条对话框
 */
public class ProgressDialogActivity extends AppCompatActivity {
  private ProgressDialog progressDialog; 

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_progress_dialog);
    progressDialog = new ProgressDialog(this);
    progressDialog.setTitle("提示title");
    progressDialog.setCancelable(true);
//    progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);//旋转进度条，默认风格
    progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);//横向进度条
    progressDialog.show(); 

  }
}

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