Android入门笔记 - 界面开发 - ProgressDialog - android

ProgressDialog 就是一个对话框，然后里面有一个Progress，ProgressDilaog来自于AlertDialog，为了方便开发，android自己将Progress设计进去了。

为了方便小伙伴们查看，现在起每写一个效果，都会把图贴上

好了，来看代码：

1. res/layout/activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="请点击以下按钮，弹出对话框" />        <Button         android:id="@+id/btn1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="圆形进度条"/>        <Button         android:id="@+id/btn2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="水平进度条"/>    </LinearLayout>

2. src/MainActivity.java

package com.example.demo_ui6_progressdialog;import android.os.Bundle;import android.app.Activity;import android.app.ProgressDialog;import android.content.Context;import android.content.DialogInterface;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;public class MainActivity extends Activity {private Context ctx = this;private ProgressDialog mPD;private Button btn1;private Button btn2;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btn1 = (Button) findViewById(R.id.btn1);btn2 = (Button) findViewById(R.id.btn2);btn1.setOnClickListener(btn1Listener);btn2.setOnClickListener(btn2Listener);}private OnClickListener btn1Listener = new OnClickListener() {@Overridepublic void onClick(View v) {mPD = new ProgressDialog(ctx);mPD.setTitle("圆形进度条Dialog");mPD.setMessage("通知消息");mPD.setIcon(R.drawable.ic_launcher);mPD.setCancelable(true);mPD.setProgressStyle(ProgressDialog.STYLE_SPINNER);mPD.setIndeterminate(false);mPD.setButton("关闭", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {mPD.dismiss();}});mPD.show();}};private OnClickListener btn2Listener = new OnClickListener() {@Overridepublic void onClick(View v) {mPD = new ProgressDialog(ctx);mPD.setTitle("水平进度条Dialog");mPD.setMessage("通知消息");mPD.setIcon(R.drawable.ic_launcher);mPD.setCancelable(true);mPD.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);mPD.setButton("关闭", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {mPD.dismiss();}});mPD.show();Thread tread = new Thread(){public void run(){int count = 0;try{while( count <= 100 ){count++;mPD.setProgress(count);sleep(500);}mPD.dismiss();}catch(Exception ex){ex.printStackTrace();}}};tread.start();}};@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

结合代码我们看到了两个button，点击之后会启动不同的进度条对话框，样式不同，一个是水平的，一个是圆形的，通过mPD.setProgressStyle(ProgressDialog. ...)来设置。

然后其中还有一些setIcon(), setTitle(), setMessage() ... 就和AlertDialog作用是相同的，这里就不一一说明了额。

Android入门笔记 - 界面开发 - ProgressDialog

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