【实例简介】android 蓝牙打印机(ESC/POS 热敏打印机)，打印菜单小票和图片，对蓝牙配对和连接打印功能进行了封装，让你超快实现蓝牙打印功能

【实例截图】

【核心代码】

package com.xmwdkk.boothprint;

import android.Manifest;

import android.bluetooth.BluetoothAdapter;

import android.content.Intent;

import android.os.Build;

import android.os.Bundle;

import android.text.TextUtils;

import android.view.View;

import android.widget.TextView;

import com.xmwdkk.boothprint.base.AppInfo;

import com.xmwdkk.boothprint.bt.BluetoothActivity;

import com.xmwdkk.boothprint.print.PrintMsgEvent;

import com.xmwdkk.boothprint.print.PrintUtil;

import com.xmwdkk.boothprint.print.PrinterMsgType;

import com.xmwdkk.boothprint.util.ToastUtil;

import de.greenrobot.event.EventBus;

/***

* Created by liugruirong on 2017/8/3.

*/

public class MainActivity extends BluetoothActivity implements View.OnClickListener {

TextView tv_bluename;

TextView tv_blueadress;

boolean mBtEnable = true;

int PERMISSION_REQUEST_COARSE_LOCATION=2;

/**

* bluetooth adapter

*/

BluetoothAdapter mAdapter;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

tv_bluename =findViewById(R.id.tv_bluename);

tv_blueadress =findViewById(R.id.tv_blueadress);

findViewById(R.id.button4).setOnClickListener(this);

findViewById(R.id.button5).setOnClickListener(this);

findViewById(R.id.button6).setOnClickListener(this);

findViewById(R.id.button).setOnClickListener(this);

//6.0以上的手机要地理位置权限

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_COARSE_LOCATION);

}

EventBus.getDefault().register(MainActivity.this);

}

@Override

protected void onStart() {

super.onStart();

BluetoothController.init(this);

}

@Override

public void btStatusChanged(Intent intent) {

super.btStatusChanged(intent);

BluetoothController.init(this);

}

@Override

public void onClick(View view) {

switch (view.getId()){

case R.id.button4:

startActivity(new Intent(MainActivity.this,SearchBluetoothActivity.class));

break;

case R.id.button5:

if (TextUtils.isEmpty(AppInfo.btAddress)){

ToastUtil.showToast(MainActivity.this,"请连接蓝牙...");

startActivity(new Intent(MainActivity.this,SearchBluetoothActivity.class));

}else {

if ( mAdapter.getState()==BluetoothAdapter.STATE_OFF ){//蓝牙被关闭时强制打开

mAdapter.enable();

ToastUtil.showToast(MainActivity.this,"蓝牙被关闭请打开...");

}else {

ToastUtil.showToast(MainActivity.this,"打印测试...");

Intent intent = new Intent(getApplicationContext(), BtService.class);

intent.setAction(PrintUtil.ACTION_PRINT_TEST);

startService(intent);

}

}

break;

case R.id.button6:

if (TextUtils.isEmpty(AppInfo.btAddress)){

ToastUtil.showToast(MainActivity.this,"请连接蓝牙...");

startActivity(new Intent(MainActivity.this,SearchBluetoothActivity.class));

}else {

ToastUtil.showToast(MainActivity.this,"打印测试...");

Intent intent2 = new Intent(getApplicationContext(), BtService.class);

intent2.setAction(PrintUtil.ACTION_PRINT_TEST_TWO);

startService(intent2);

}

case R.id.button:

if (TextUtils.isEmpty(AppInfo.btAddress)){

ToastUtil.showToast(MainActivity.this,"请连接蓝牙...");

startActivity(new Intent(MainActivity.this,SearchBluetoothActivity.class));

}else {

ToastUtil.showToast(MainActivity.this,"打印图片...");

Intent intent2 = new Intent(getApplicationContext(), BtService.class);

intent2.setAction(PrintUtil.ACTION_PRINT_BITMAP);

startService(intent2);

}

// startActivity(new Intent(MainActivity.this,TextActivity.class));

break;

}

}

/**

* handle printer message

*

* @param event print msg event

*/

public void onEventMainThread(PrintMsgEvent event) {

if (event.type == PrinterMsgType.MESSAGE_TOAST) {

ToastUtil.showToast(MainActivity.this,event.msg);

}

}

@Override

protected void onDestroy() {

super.onDestroy();

EventBus.getDefault().register(MainActivity.this);

}

}