android学习笔记七——控件(DatePicker、TimePicker、ProgressBar)

布局文件==》
<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:id="@+id/tvValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="执行进度" />

    <!-- 定义一个水平进度条 -->

    <ProgressBar
        android:id="@+id/bar"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:max="100" />
    <!-- 定义一个水平进度条，并改变轨道外观 -->


    <ProgressBar
        android:id="@+id/bar2"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:max="300"
        android:progressDrawable="@drawable/ucbar" />

</LinearLayout>

资源文件==》
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <!-- 定义轨道背景 -->
    <item
        android:id="@android:id/background"
        android:drawable="@drawable/no"/>
    <!-- 定义轨道已完成部分样式 -->
    <item
        android:id="@android:id/progress"
        android:drawable="@drawable/ok"/>

</layer-list>

代码实现==》

package com.example.myprogressbar;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.ProgressBar;
import android.widget.TextView;

@SuppressLint("HandlerLeak")
public class MainActivity extends Activity
{
	int hasData = 0;
	int mProgressBarStatus = 0;
	TextView tv;

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

		tv = (TextView) this.findViewById(R.id.tvValue);
		final ProgressBar bar1 = (ProgressBar) this.findViewById(R.id.bar);
		final ProgressBar bar2 = (ProgressBar) this.findViewById(R.id.bar2);
		// 用于更新进度
		final Handler hanler = new Handler()
		{
			@Override
			public void handleMessage(Message msg)
			{
				// 标识该消息是由该程序发送的
				if (msg.what == 1)
				{
					bar1.setProgress(mProgressBarStatus);
					bar2.setProgress(mProgressBarStatus);
					tv.setText(Integer.toString(hasData));
					Log.i("swg", (String) tv.getText());
				}
			}
		};

		// 启动线程执行任务
		new Thread()
		{
			public void run()
			{
				while (mProgressBarStatus < 300)
				{
					mProgressBarStatus = doWork();
					Message msg = new Message();
					msg.what = 1;
					hanler.sendMessage(msg);
				}
			}
		}.start();
	}

	private int doWork()
	{
		hasData++;
		try
		{
			Thread.sleep(100);
		} catch (InterruptedException e)
		{
			e.printStackTrace();
		}
		return hasData;
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu)
	{
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
}

布局文件==》
<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/btnDisplay"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示" />

    <Button
        android:id="@+id/btnHide"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="隐藏" />

</LinearLayout>

代码实现==》
package com.example.mytitlebar;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;

public class MainActivity extends Activity
{
	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		// 设置窗口特性，启用显示进度的进度条
		requestWindowFeature(Window.FEATURE_PROGRESS);
		// 设置窗口特性，启用不显示进度的进度条
		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
		setContentView(R.layout.activity_main);

		Button btnDisplay = (Button) this.findViewById(R.id.btnDisplay);
		Button btnHide = (Button) this.findViewById(R.id.btnHide);

		btnDisplay.setOnClickListener(new ButtonOnClickLintener());
		btnHide.setOnClickListener(new ButtonOnClickLintener());
	}

	private class ButtonOnClickLintener implements OnClickListener
	{

		@Override
		public void onClick(View v)
		{
			switch (v.getId())
			{
			case R.id.btnDisplay:
				// 显示不带进度的进度条
				setProgressBarIndeterminateVisibility(true);
				// 显示带进度的进度条
				setProgressBarVisibility(true);
				// 设置进度条的进度
				setProgress(500);
				break;
			case R.id.btnHide:
				// 隐藏不带进度的进度条
				setProgressBarIndeterminateVisibility(false);
				// 隐藏带进度的进度条
				setProgressBarVisibility(false);
				break;
			}
		}
	}

	@Override
	public 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;
	}
}