ProgressBar简单实例

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指示当前进度

1.在布局中添加ProgressBar
这里写图片描述

<RelativeLayout 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"    tools:context="${relativePackage}.${activityClass}" >    <ProgressBar        android:id="@+id/progress_bar"        style="@android:style/Widget.ProgressBar.Horizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content"        /></RelativeLayout>

package com.example.progressbardemo;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.widget.ProgressBar;public class MainActivity extends Activity {    String tag = MainActivity.class.getSimpleName();    private static int PROGRESS = 0;    private ProgressBar mProgress;    private int mProgressStatus = 0;    Handler mHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            mProgress.setProgress(mProgressStatus);        }    };    protected void onCreate(Bundle icicle) {        super.onCreate(icicle);        setContentView(R.layout.activity_main);        mProgress = (ProgressBar) findViewById(R.id.progress_bar);        new Thread(new Runnable() {            public void run() {                while (mProgressStatus < 100) {                    mProgressStatus = doWork();                    mHandler.sendEmptyMessage(0);                    Log.d(tag, (System.currentTimeMillis()) / 1000 + ""                            + mProgressStatus);                }            }        }).start();    }    public int doWork() {        try {            PROGRESS += 10;            Thread.currentThread();            Thread.sleep(1000);        } catch (InterruptedException e) {            e.printStackTrace();        }        return PROGRESS;    }}

不确定进度显示

这里写图片描述

<RelativeLayout 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"    tools:context="${relativePackage}.${activityClass}" >    <ProgressBar        android:id="@+id/progress_bar"        style="@android:style/Widget.ProgressBar.Large"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerInParent="true"        android:layout_marginRight="5dp" />    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@id/progress_bar"        android:layout_centerHorizontal="true"        android:paddingTop="8dp"        android:text="加载中..." /></RelativeLayout>

只要简单的使用一个布局就可以完成这样动态的效果！

翻译地址

https://developer.android.com/reference/android/widget/ProgressBar.html

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