一、ProgressBar

ProgressBar: 进度条
内置的进度条样式有两种写法，以水平进度条为例：

style="?android:attr/progressBarStyleHorizontal"style="@android:style/Widget.ProgressBar.Horizontal"

效果如下：

常用属性：

android:max：设置进度的最大值。android:progress:设置当前第一进度值。android:secondaryProgress：设置当前第二进度值。android:visibility：设置是否显示，默认显示。visible可见，invisible不可见但占据屏幕空间，gone不可见且不占用屏幕空间

设置第二进度后的效果如下：

动态控制进度条：

setProgress(int)：设置当前进度值incrementProgressBy(int)：设置当前进度值的增量setSecondaryProgress(int)：与上类似incrementSecondaryProgressBy(int)：与上类似

设置可见性：

setVisibility()，一共三个参数，View.VISIBLE, View.INVISIBLE, View.GONE。对应XML的三个属性

其他样式都是圆形动画，无法控制进度。样式大同小异，如下：

二、ProgressDialog

简易用法：

private ProgressDialog progressDialog;private void showProgressDialog() {    if (progressDialog == null) {        progressDialog = new ProgressDialog(context);        progressDialog.setMessage("正在加载");        progressDialog.setCanceledOnTouchOutside(false);    }    progressDialog.show();}private void closeProgressDialog() {    if (progressDialog != null) {        progressDialog.dismiss();    }}

三、AlertDialog

简易用法：

/** 创建AlertDialog并显示 **/private void showAlertDialog() {    // 下面的设置项都是可选的    AlertDialog.Builder alertD = new AlertDialog.Builder(this)                .setTitle("这里是标题")                .setIcon(R.drawable.ic_launcher)                 .setMessage("这里是提示信息")                 .setView(myLayout) // 要在AlertDialog中显示的自定义View对象                .setCancelable(false) // 不能按手机的返回键取消                .setPositiveButton("PositiveButton显示进度值", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        // do something...                    }                })                .setNegativeButton("NegativeButton取消", null);     alertD.create();    // This allows the user to do any extra processing before displaying the dialog.     // Use show() if you don't have any other processing to do and want this to be created and displayed.    alertD.show();}

四、Demo

进度条相关的ProgressDialog、AlertDialog的Demo

activity_main.xml:

<LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">         <TextView         android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="圆进度条@android:style/Widget.ProgressBar"        />    <ProgressBar         android:layout_width="match_parent"        android:layout_height="wrap_content"        style="@android:style/Widget.ProgressBar"        />        <TextView         android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="圆进度条Style：?android:attr/progressBarStyle"        />    <ProgressBar         android:layout_width="match_parent"        android:layout_height="wrap_content"        style="?android:attr/progressBarStyle"        />    <TextView         android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="长进度条@android:style/Widget.ProgressBar.Horizontal"        />    <ProgressBar         android:id="@+id/progressbar_horizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content"        style="@android:style/Widget.ProgressBar.Horizontal"        />        <LinearLayout         android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal"        >                <Button             android:id="@+id/button_Add"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="+"            />                <Button             android:id="@+id/button_Reduce"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="-"            android:layout_marginLeft="30dp"            />                <Button             android:id="@+id/button_visible"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="显/隐进度条"            android:layout_marginLeft="30dp"            />            </LinearLayout>         <Button         android:id="@+id/button_pd_1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="圆形进度条的ProgressDialog"        />    <Button         android:id="@+id/button_ad_1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="长方形进度条的AlertDialog"        />  </LinearLayout>

my_view.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal"    android:gravity="center_horizontal"     >         <Button         android:id="@+id/myView_reduce"        android:layout_width="50dp"        android:layout_height="wrap_content"        android:text="-"        />        <ProgressBar         android:id="@+id/myView_progressBar"        android:layout_width="178dp"        android:layout_height="wrap_content"        android:layout_gravity="center_vertical"        style="@android:style/Widget.ProgressBar.Horizontal"        android:progress="57"        />        <Button         android:id="@+id/myView_add"        android:layout_height="wrap_content"        android:layout_width="50dp"        android:text="+"        />        </LinearLayout>

MainActivity.java:

package com.example.test;import android.app.Activity;import android.app.AlertDialog;import android.app.ProgressDialog;import android.content.DialogInterface;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;import android.widget.LinearLayout;import android.widget.ProgressBar;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener{        private Button btnAdd, btnReduce, btnVisible, btnPb1, btnAd1, myUp, myDown;    private ProgressBar pbHor, myPb;    private AlertDialog.Builder alertD;    private LayoutInflater layoutInflater;    private LinearLayout myLayout;        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        setProgressBarVisibility(true);        setContentView(R.layout.activity_main);                btnAdd = (Button) findViewById(R.id.button_Add);        btnReduce = (Button) findViewById(R.id.button_Reduce);        btnVisible = (Button) findViewById(R.id.button_visible);        btnPb1 = (Button) findViewById(R.id.button_pd_1);        btnAd1 = (Button) findViewById(R.id.button_ad_1);        pbHor = (ProgressBar) findViewById(R.id.progressbar_horizontal);                btnAdd.setOnClickListener(this);        btnReduce.setOnClickListener(this);        btnVisible.setOnClickListener(this);        btnPb1.setOnClickListener(this);        btnAd1.setOnClickListener(this);    }        @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.button_Add:            if (pbHor.getProgress() <= 90) {                pbHor.setProgress(pbHor.getProgress() + 10);            }             break;        case R.id.button_Reduce:            if (pbHor.getProgress() >= 10) {                pbHor.setProgress(pbHor.getProgress() - 10);             }             break;        case R.id.button_visible:            if (pbHor.getVisibility() == View.VISIBLE) {                pbHor.setVisibility(View.GONE);            } else {                pbHor.setVisibility(View.VISIBLE);            }            break;        case R.id.button_pd_1:            // 创建一个ProgressDialog，不能写成如下一大串            ProgressDialog mypDialog = new ProgressDialog(this);                            // 默认为圆形风格，STYLE_HORIZONTAL则为长方形风格            // mypDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);            // 标题            mypDialog.setTitle("KingLearnJava");            // 提示信息            mypDialog.setMessage(getResources().getString(R.string.pd_message));            // 标题图标            mypDialog.setIcon(R.drawable.ic_launcher);            // 第一个按钮            mypDialog.setButton("第一个按钮", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    dialog.dismiss();                }            });            // 第二个按钮            mypDialog.setButton2("第二个按钮", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    dialog.dismiss();                }            });            // 进度条是否不明确            mypDialog.setIndeterminate(false);            // 是否可以按返回键取消            mypDialog.setCancelable(true);            // 显示            mypDialog.show();            break;        case R.id.button_ad_1:            // 这里用另一种方法来载入布局            // 获得系统的布局过滤服务            layoutInflater = (LayoutInflater) getSystemService(this.LAYOUT_INFLATER_SERVICE);            // 得到事先设计好的布局            myLayout = (LinearLayout) layoutInflater.inflate(R.layout.my_view, null);            // 获得自定义View里的控件            myUp = (Button) myLayout.findViewById(R.id.myView_add);            myDown = (Button) myLayout.findViewById(R.id.myView_reduce);            myPb = (ProgressBar) myLayout.findViewById(R.id.myView_progressBar);            myUp.setOnClickListener(this);            myDown.setOnClickListener(this);            // 设置初始进度值            myPb.setProgress(50);            alertD = new AlertDialog.Builder(this)                    .setTitle("这里是标题")                    .setIcon(R.drawable.ic_launcher)                    .setMessage("这里是提示信息")                    .setView(myLayout)                    .setCancelable(false) // 不能按手机的返回键取消                    .setPositiveButton("PositiveButton显示进度值", new DialogInterface.OnClickListener() {                        @Override                        public void onClick(DialogInterface dialog, int which) {                            Toast.makeText(MainActivity.this, "现在的进度值是" + myPb.getProgress()                                    , Toast.LENGTH_LONG).show();                        }                    })                    .setNegativeButton("NegativeButton取消", null);            alertD.show();            break;        case R.id.myView_add:            myPb.incrementProgressBy(1);            break;        case R.id.myView_reduce:            myPb.incrementProgressBy(-1);            break;        default:            break;        }    }}

效果如图：

Android(安卓)UI 之 ProgressBar、ProgressDialog、AlertDialog

一、ProgressBar

二、ProgressDialog

简易用法：

三、AlertDialog

四、Demo

进度条相关的ProgressDialog、AlertDialog的Demo

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