android四種對話框（dialog）的簡單使用方法

有普通對話框，單選對話框，復選對話框，進度條的兩種實現方法話不多說，直接上代碼

activity_main.xml:

 

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <LinearLayout
        android:id="@+id/mainLinearLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="普通對話框"
            android:onClick="normalDialog"/>

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="單選對話框"
            android:onClick="singleDialog"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="復選對話框"
            android:onClick="MultiDialog"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="進度條對話框"
            android:onClick="progressDialog"/>
        <Button
            android:id="@+id/downlodebutton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="進度條對話框"
            android:onClick="progressDialog"/>
    </LinearLayout>

</android.support.constraint.ConstraintLayout>

 

MainActivity.java:

 

package com.lgqrlchinese.dialogtext;

import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.SystemClock;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    protected String result;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        progerssNow();
    }

    //普通對話框
    public void normalDialog(View view) {
        //構建器
        AlertDialog.Builder b = new AlertDialog.Builder(this);
        //設置標題
        b.setTitle("普通對話框");
        //設置提示信息
        b.setMessage("是否確定退出");
        //設置圖標
        b.setIcon(R.drawable.ic_launcher_background);
        //添加確定按鈕
        b.setPositiveButton("確定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                finish();
            }
        });
        //添加取消按鈕
        b.setNegativeButton("取消", null);
        //創建對話框
        b.create();
        //顯示
        b.show();
    }

    //單選對話框
    public void singleDialog(View view) {
        AlertDialog.Builder b = new AlertDialog.Builder(this);
        b.setTitle("單選對話框");
        //選項內容
        final String item[] = {"A", "B", "C", "D"};
        //setSingleChoiceItems(顯示的選項內容，默認值，監聽事件)
        b.setSingleChoiceItems(item, -1, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                //取出數組中的數據
                result = item[i];
                //吐司顯示出來
                Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();
            }
        });
        //設置確定按鈕
        b.setPositiveButton("確定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                Toast.makeText(getApplicationContext(), "選擇的結果是" + result, Toast.LENGTH_SHORT).show();
            }
        });

        b.create();
        b.show();
    }

    //復選對話框
    public void MultiDialog(View view) {
        AlertDialog.Builder b = new AlertDialog.Builder(this);
        b.setTitle("復選框對話框");
        b.setIcon(R.drawable.ic_launcher_background);
        //設置選項
        final String item[] = {"A", "B", "C", "D"};
        //設置默認值
        final boolean chechedItem[] = {true, false, true, true};
        //設置多選setMultiChoiceItems(選項數組，默認值，監聽事件)
        b.setMultiChoiceItems(item, chechedItem, new DialogInterface.OnMultiChoiceClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i, boolean b) {

            }
        });
        b.setPositiveButton("確定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                StringBuffer stringBuffer = new StringBuffer();
                for (int i1 = 0; i1 < chechedItem.length; i1++) {
                    if (chechedItem[i1]) {
                        stringBuffer.append(item[i1] + "  ");
                    }
                }
                Toast.makeText(getApplicationContext(), stringBuffer.toString(), Toast.LENGTH_SHORT).show();
            }
        });
        b.create();
        b.show();
    }

    //進度條對話框
    /*
     * 在API level 26 中，ProgressDialog被聲明不贊成使用，應使用的替代方法是ProgressBar
     * */
    public void progressDialog(View view) {
        final ProgressDialog progressDialog = new ProgressDialog(this);
        //設置標題
        progressDialog.setTitle("正在加載中》》》");
        //設置樣式
        progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        //（模擬下載）線程睡眠
        new Thread() {
            @Override
            public void run() {
                //設置最大值
                progressDialog.setMax(100);
                //設置當前值
                for (int i = 0; i < 100; i++) {
                    progressDialog.setProgress(i);
                    SystemClock.sleep(500);
                }
                progressDialog.dismiss();
            }
        }.start();
        progressDialog.show();
    }

    //進度條對話框（推薦使用）
    public void progerssNow() {
        LinearLayout mainLayout;
        Button downlodebutton;
        mainLayout = findViewById(R.id.mainLinearLayout);
        downlodebutton = findViewById(R.id.downlodebutton);
        final ProgressBar progressBar = new ProgressBar(this, null, android.R.attr.progressBarStyleHorizontal);
        downlodebutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                new Thread() {
                    @Override
                    public void run() {

                        progressBar.setMax(100);
                        for (int i = 0; i < 100; i++) {
                            progressBar.setProgress(i);
                            SystemClock.sleep(12);
                        }

                    }
                }.start();
            }
        });
        mainLayout.addView(progressBar);
    }
}