Android动态刷新界面

效果图：

activity_main.xml

<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" >

    <Button
        android:id="@+id/btn_add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="添加" />

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <LinearLayout
            android:id="@+id/ll"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical" >
        </LinearLayout>
    </ScrollView>  </LinearLayout>

MainActivity.java

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

    private LinearLayout llGroup;
    private int i = 0;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        llGroup = (LinearLayout) findViewById(R.id.ll);
    }

    public void onClick(View v){
    
        //定义一个Textview对象
    	TextView tv = new TextView(this);
        //设置TextView文本内容
        tv.setText("Test: " + ++i);
    	
    	//把textview对象添加到linearLayout中
    	llGroup.addView(tv);
    }
}

Android动态刷新界面