標籤：android控制項開發 progress 進度條 下載進度條
android控制項開發之progress
本博文主要講述的是android開發中的progress進度條的使用方法，代碼如下：
MainActivity.java：
package com.example.progress;
import android.os.Bundle;
import android.R.integer;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
public class MainActivity extends Activity {
private ProgressBar firstBar = null;
private ProgressBar secendBar = null;
private Button myButton = null;
private int i = 0; //記錄bar的位置
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
firstBar = (ProgressBar)findViewById(R.id.firstBar);
secendBar = (ProgressBar)findViewById(R.id.secendBar);
myButton = (Button)findViewById(R.id.myButton);
//綁定監聽器
myButton.setOnClickListener(new myBuutonSetOnclickListener());
}
class myBuutonSetOnclickListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(i == 0){
//設定progress bar可見
firstBar.setVisibility(View.VISIBLE);
secendBar.setVisibility(View.VISIBLE);
}
else if(i > 0 && i < firstBar.getMax()){
//設定進度條的主進度的當前值
firstBar.setProgress(i);
//設定進度條的第二進度的當前值
firstBar.setSecondaryProgress(i + 10);
}
else{
firstBar.setVisibility(View.GONE);
secendBar.setVisibility(View.GONE);
firstBar.setProgress(0);
firstBar.setSecondaryProgress(0);
i = -10;
}
i += 10;
}
}
@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;
}
}
布局檔案main.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
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" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<ProgressBar
android:id="@+id/firstBar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="200"
android:visibility="gone"
style="?android:attr/progressBarStyleHorizontal"/>
<ProgressBar
android:id="@+id/secendBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
style="?android:attr/progressBarStyle"/>
<Button
android:id="@+id/myButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="button"
tools:ignore="HardcodedText" />
</LinearLayout>
顯示的效果如下：
當點擊按鈕時，進度條會一步一步前進
android控制項開發之progress
