Andorid+ ScrollView+ListView动态添加TextView ,点下一步可以内容下移背景色可以变，同时点播放按钮可以自动播放且显示背景色。
1.总体架构为:
2
效果图为
3.代码展示
layout_code.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/tv_code" android:layout_width="match_parent" android:layout_height="30dp" android:text="xxxx" android:textSize="20sp" /> </LinearLayout>
layout_res.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_marginTop="20dp" android:layout_height="300dp" android:scrollbars="vertical" android:scrollbarThumbVertical="@color/white" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <ListView android:id="@+id/lv_item" android:layout_width="match_parent" android:layout_height="280dp"/> </LinearLayout> </ScrollView> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <Button android:id="@+id/bu1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="下一步" android:layout_marginLeft="100dp" /> <Button android:id="@+id/bu2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="播放" android:layout_marginLeft="10dp" /> </LinearLayout> </LinearLayout>
colors.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <color name="colorPrimary">#3F51B5</color> <color name="colorPrimaryDark">#303F9F</color> <color name="colorAccent">#FF4081</color> <color name="gray">#999999</color> <color name="white">#FFFFFF</color> <color name="HHH">#CCFFCC</color> </resources>
Code.java
package android.yichun.com.lesson_6.fragment; /** * Created by Lenovo on 2017/12/30. */ public class Code { private String code; public String getCode() { return code; } public void setCode(String code) { this.code = code; } }
CodeActivity.java
package android.yichun.com.lesson_6.fragment; import android.content.Context; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.TextView; import android.yichun.com.lesson_6.R; import java.util.ArrayList; import java.util.List; /** * Created by Lenovo on 2017/12/30. */ public class CodeActivity extends AppCompatActivity { private Code code; private ListView lv_code; private List<Code> codes; private int currentRow = 0; private CodeAdapter codeAdapter; private Button btn_next, btn_play; String[] str={"void insert_sqlist(sqlink sq, datatype x, int i)","{","int j = 1;","if(isfull_sqlist(sq))","{"," printf(\"sqlist is full!\\n\");"," return;"," }","if(i<1 || i>getlength_sqlist(sq)+1)","{"," printf(\"i is not in the range!\\n\");"," return;"," }","for(j = getlength_sqlist(sq)-1; j>=i-1; j--)","{","sq->data[j+1] = sq->data[j];"," }","sq->data[i-1] = x;","++sq->length;","}"}; boolean isRun = false; boolean isPlay = false; private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); codeAdapter.notifyDataSetChanged(); //Toast.makeText(CodeActivity.this, "currentRow=" + currentRow + ", str.length=" + str.length, Toast.LENGTH_SHORT).show(); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_res); getData(str); initView(); } private void getData(String[] arr) { codes = new ArrayList<>(); for(int i = 0; i < arr.length; i++){ Code c = new Code(); c.setCode(arr[i]); codes.add(c); } } private void initView() { lv_code = (ListView) findViewById(R.id.lv_item); codeAdapter= new CodeAdapter(this, codes); lv_code.setAdapter(codeAdapter); lv_code.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int postion, long l) { currentRow = postion; codeAdapter.notifyDataSetChanged(); isPlay = false; // handler.sendEmptyMessage(1); } }); btn_next = (Button) findViewById(R.id.bu1); btn_play = (Button) findViewById(R.id.bu2); btn_next.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { currentRow++; codeAdapter.notifyDataSetChanged(); isPlay = false; } }); btn_play.setOnClickListener(new View.OnClickListener() { //int index=str.length; @Override public void onClick(View view) { // handler.sendEmptyMessage(1); isPlay = true; if(isRun == false){ new Thread(){ @Override public void run() { super.run(); while(true){ try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } if((currentRow < str.length) && (isPlay == true)){ currentRow++; handler.sendEmptyMessage(1); } } } }.start(); isRun = true; } } }); } class CodeAdapter extends BaseAdapter { private List<Code> codes; private Context context; public CodeAdapter(Context context, List<Code> codes){ this.context = context; this.codes = codes; } @Override public int getCount() { return codes.size(); } @Override public Object getItem(int position) { return position; } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder vh = null; if(convertView == null){ convertView = getLayoutInflater().from(context).inflate(R.layout.layout_code, null); vh = new ViewHolder(); vh.tv_code = (TextView) convertView.findViewById(R.id.tv_code); if(position==0){ vh.tv_code.setBackgroundColor(getResources().getColor(R.color.gray)); } convertView.setTag(vh); }else{ vh = (ViewHolder) convertView.getTag(); } Code e = codes.get(position); //赋值 vh.tv_code.setText(e.getCode()); if(position == currentRow){ vh.tv_code.setBackgroundColor(getResources().getColor(R.color.HHH)); }else{ vh.tv_code.setBackgroundColor(getResources().getColor(R.color.white)); } return convertView; } } class ViewHolder{ public TextView tv_code; } }