android-progress简单例子

最新推荐文章于 2024-10-12 17:18:20 发布

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#android #layout #button #encoding #class

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本文详细阐述了如何在Android应用中实现一个简单的进度条组件，并通过按钮点击事件触发其更新逻辑，展示进度条和副进度条的同步变化。

package zhang.progress;

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 Prpgress extends Activity {
	private ProgressBar p1;
	private ProgressBar p2;
	private Button myButton;
	private int i=0;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        p1=(ProgressBar)findViewById(R.id.p1);
        p2=(ProgressBar)findViewById(R.id.p2);
        myButton=(Button)findViewById(R.id.button);
        myButton.setOnClickListener(new ButtonListener());   
 }
    class ButtonListener implements OnClickListener{

		@Override
		public void onClick(View arg0) {
		
			// TODO Auto-generated method stub
			if(i==0)
			{
				p1.setVisibility(View.VISIBLE);
				p2.setVisibility(View.VISIBLE);
			}
			
			else if(i<p1.getMax()){
				p1.setProgress(i);
				p2.setSecondaryProgress(i+10);
				p2.setProgress(i);
		}
			else{
				p1.setVisibility(View.GONE);
				p2.setVisibility(View.GONE);
			}
    	i=i+10;
    	
    }
		}

}

<?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"
    >
<ProgressBar
	android:id="@+id/p1" 
	style="?android:attr/progressBarStyleHorizontal"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:visibility="gone"

    />
<ProgressBar
	android:id="@+id/p2" 
	style="?android:attr/progressBarStyle"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
     android:visibility="gone"
/>
<Button 
	android:id="@+id/button"
	android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="start"
    
    />

    
  
</LinearLayout>