led.jar是用来控制led显示屏的
首先将jar包和so文件添加到工程,可参考
https://blog.csdn.net/qq_40733723/article/details/89032484
基本步骤
1、初始化ui控件
2、初始化led
(1)实例化led管理
(2)打开串口
(3)设置运行模式、播放速度
3、发送消息
xml代码
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="30dp"
tools:context=".MainActivity">
<EditText
android:id="@+id/etWord"
android:layout_width="300sp"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:textSize="30sp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/etWord"
android:onClick="btSend"
android:text="发送"
android:textSize="30sp" />
</RelativeLayout>
主函数代码
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import com.newland.utils.LEDManager;
public class MainActivity extends AppCompatActivity {
private LEDManager ledManager;
private int com;
private EditText etWord;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initLed();
}
private void initView() {
etWord = findViewById(R.id.etWord);
}
private void initLed() {
ledManager = new LEDManager();
com = -1;
com = ledManager.openUart(1,0,3);
if(com < 0){
Toast.makeText(this, "串口打开失败", Toast.LENGTH_SHORT).show();
return ;
}
//设置led显示屏的播放速度
ledManager.setcSpeed(1);
}
public void btSend(View v){
String word = etWord.getText().toString().trim();
if(com > 0 && !"".equals(word)){
//发送不保存数据,断电后丢失
ledManager.sendMsgUart(word);
}
}
@Override
protected void onDestroy() {
ledManager.closeUart();
super.onDestroy();
}
}