android Progress进度条使用

首先是Progress的布局

相关参数有

1：style="?android:attr/progressBarStyleHorizontal"--------设置进度条显示的样式（水平方向的）

2：android:visibility="gone"---------设置为不可见

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><TextView      android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="@string/hello"    /><ProgressBarandroid:id="@+id/firstBar"style="?android:attr/progressBarStyleHorizontal"android:layout_width="200dp"android:layout_height="wrap_content"android:visibility="gone"    />     <ProgressBarandroid:id="@+id/secondBar"style="?android:attr/progressBarStyle"android:layout_width="200dp"android:layout_height="wrap_content"android:visibility="gone"    /><Buttonandroid:id="@+id/myButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/progressBar_Button_Name"/></LinearLayout>

?然后通过Activity调用布局文件

android进度条的默认大小为100；可以通过setProgress(int i);设置进度大小

并且android进度条默认是不可见的可以通过Progress.setVisibility(View.VISIBLE);设置可见

也可以设置为不可见：Progress.setVisibility(View.GONE);

package zhou.demo;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ProgressBar;public class ProgressBarTest extends Activity {    //对控件进行声明private ProgressBar firstBar = null;private ProgressBar secondBar = null;private Button myButton = null;private int i = 0;    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        //根据控件的ID来取得控件对象        firstBar = (ProgressBar)this.findViewById(R.id.firstBar);        secondBar = (ProgressBar)findViewById(R.id.secondBar);        myButton  = (Button)findViewById(R.id.myButton);        myButton.setOnClickListener(new OnClickListener(){public void onClick(View v) {if(i == 0){//设置进度条可见firstBar.setVisibility(View.VISIBLE);secondBar.setVisibility(View.VISIBLE);}else if(i < 100){firstBar.setProgress(i);firstBar.setSecondaryProgress(i+5);secondBar.setProgress(i);}else{//设置进度条不可见firstBar.setVisibility(View.GONE);secondBar.setVisibility(View.GONE);}i += 10;}                });    }}

?