一、基础知识:
1.ProgressBar在界面文件XML中的布局:
[html]
<progressBar android:id="@+id/progressbar_updown"
android:layout_width="200dp"
android:layout_height="wrap_content"
style="?android:attr/progressBarStyleHorizontal"
android:layout_gravity="center_vertical"
android:max="100"
android:progress="50"
android:secondaryProgress="70" >
<progressBar android:id="@+id/progressbar_updown"
android:layout_width="200dp"
android:layout_height="wrap_content"
style="?android:attr/progressBarStyleHorizontal"
android:layout_gravity="center_vertical"
android:max="100"
android:progress="50"
android:secondaryProgress="70" >
[plain]
style="?android:attr/progressBarStyleHorizontal" 设置风格为长形
android:max="100" 最大进度值为100
android:progress="50" 初始化的进度值
android:secondaryProgress="70" 初始化的底层第二个进度值
android:layout_gravity="center_vertical" 垂直居中
style="?android:attr/progressBarStyleHorizontal" 设置风格为长形
android:max="100" 最大进度值为100
android:progress="50" 初始化的进度值
android:secondaryProgress="70" 初始化的底层第二个进度值
android:layout_gravity="center_vertical" 垂直居中
2.ProgressBar在代码文件(.java)中的控制使用:
[java]
private ProgressBar myProgressBar;
//定义ProgressBar
myProgressBar = (ProgressBar) findViewById(R.id.progressbar_updown);
//ProgressBar通过ID来从XML中获取
myProgressBar.incrementProgressBy(5);
//ProgressBar进度值增加5
myProgressBar.incrementProgressBy(-5);
//ProgressBar进度值减少5
myProgressBar.incrementSecondaryProgressBy(5);
//ProgressBar背后的第二个进度条 进度值增加5
myProgressBar.incrementSecondaryProgressBy(-5);
//ProgressBar背后的第二个进度条 进度值减少5
private ProgressBar myProgressBar;
//定义ProgressBar
myProgressBar = (ProgressBar) findViewById(R.id.progressbar_updown);
//ProgressBar通过ID来从XML中获取
myProgressBar.incrementProgressBy(5);
//ProgressBar进度值增加5
myProgressBar.incrementProgressBy(-5);
//ProgressBar进度值减少5
myProgressBar.incrementSecondaryProgressBy(5);
//ProgressBar背后的第二个进度条 进度值增加5
myProgressBar.incrementSecondaryProgressBy(-5);
//ProgressBar背后的第二个进度条 进度值减少5
3.XML重要属性
android:progressBarStyle：默认进度条样式
android:progressBarStyleHorizontal：水平样式
4.重要方法
[plain]
getMax()：返回这个进度条的范围的上限
getProgress()：返回进度
getSecondaryProgress()：返回次要进度
incrementProgressBy(int diff)：指定增加的进度
isIndeterminate()：指示进度条是否在不确定模式下
setIndeterminate(boolean indeterminate)：设置不确定模式下
setVisibility(int v)：设置该进度条是否可视
getMax()：返回这个进度条的范围的上限
getProgress()：返回进度
getSecondaryProgress()：返回次要进度
incrementProgressBy(int diff)：指定增加的进度
isIndeterminate()：指示进度条是否在不确定模式下
setIndeterminate(boolean indeterminate)：设置不确定模式下
setVisibility(int v)：设置该进度条是否可视
二、代码展示:
1."Activity_09srcyanactivity_09MainActivity.java"
[java]
package yan.activity_09;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.app.Activity;
public class MainActivity extends Activity {
// 声明变量
private ProgressBar firstBar = null;
private ProgressBar secondBar = null;
private Button myButton = null;
private int progress_vol = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//映射控件ID到变量
firstBar = (ProgressBar)findViewById(R.id.firstBar);
secondBar = (ProgressBar)findViewById(R.id.secondBar);
myButton = (Button)findViewById(R.id.myButton);
myButton.setOnClickListener(new ButtonListenr());
}
class ButtonListenr implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(0 == progress_vol)
{
// 设置进度条的最大值
firstBar.setMax(200);
// 设置进度条为可见的状态
firstBar.setVisibility(View.VISIBLE);
secondBar.setVisibility(View.VISIBLE);
}else if(progress_vol < firstBar.getMax()){
// 设置主进度条的当前值
firstBar.setProgress(progress_vol);
// 设置第二进度条的当前值
firstBar.setSecondaryProgress(progress_vol+10);
// 默认的进度条是无法显示进行的状态的
//secondBar.setProgress(progress_vol);
}else{
// 设置进度条为不可见的状态
firstBar.setVisibility(View.GONE);
secondBar.setVisibility(View.GONE);
}
progress_vol +=10;
}
}
}
package yan.activity_09;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.app.Activity;
public class MainActivity extends Activity {
// 声明变量
private ProgressBar firstBar = null;
private ProgressBar secondBar = null;
private Button myButton = null;
private int progress_vol = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//映射控件ID到变量
firstBar = (ProgressBar)findViewById(R.id.firstBar);
secondBar = (ProgressBar)findViewById(R.id.secondBar);
myButton = (Button)findViewById(R.id.myButton);
myButton.setOnClickListener(new ButtonListenr());
}
class ButtonListenr implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(0 == progress_vol)
{
// 设置进度条的最大值
firstBar.setMax(200);
// 设置进度条为可见的状态
firstBar.setVisibility(View.VISIBLE);
secondBar.setVisibility(View.VISIBLE);
}else if(progress_vol < firstBar.getMax()){
// 设置主进度条的当前值
firstBar.setProgress(progress_vol);
// 设置第二进度条的当前值
firstBar.setSecondaryProgress(progress_vol+10);
// 默认的进度条是无法显示进行的状态的
//secondBar.setProgress(progress_vol);
}else{
// 设置进度条为不可见的状态
firstBar.setVisibility(View.GONE);
secondBar.setVisibility(View.GONE);
}
progress_vol +=10;
}
}
}
2."Activity_09reslayoutmain.xml"
[html]
<?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"
android:background="#00aaaa"
>
<TextView
android:id="@+id/firstText"
android:text="@string/hello_world"
android:gravity="center_vertical"
android:textSize="15pt"
android:background="#aa0000"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:singleLine="true"/>
<ProgressBar
android:id="@+id/firstBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:visibility="gone"
/>
<ProgressBar
android:id="@+id/secondBar"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
/>
<Button
android:id="@+id/myButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="begin"
/>
</LinearLayout>
<?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"
android:background="#00aaaa"
>
<TextView
android:id="@+id/firstText"
android:text="@string/hello_world"
android:gravity="center_vertical"
android:textSize="15pt"
android:background="#aa0000"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:singleLine="true"/>
<ProgressBar
android:id="@+id/firstBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:visibility="gone"
/>
<ProgressBar
android:id="@+id/secondBar"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
/>
<Button
android:id="@+id/myButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="begin"
/>
</LinearLayout>
3."Activity_09resvaluesstrings.xml"
[html]
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Activity_09</string>
<string name="hello_world">Hello world!</string>
<string name="menu_settings">Settings</string>
</resources>
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Activity_09</string>
<string name="hello_world">Hello world!</string>
<string name="menu_settings">Settings</string>
</resources>
三、效果展示:
开发之进度条-android开发进度条">