android BlueTooth蓝牙

最新推荐文章于 2021-05-27 08:58:11 发布

原创最新推荐文章于 2021-05-27 08:58:11 发布 · 268 阅读

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#android BlueTooth #蓝牙 #BlueTooth

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本文介绍了一个Android应用示例，通过MainActivity实现了蓝牙功能的开关控制及远程蓝牙设备的搜索功能。用户可以通过CheckBox来启用或禁用蓝牙，并查看TextView中显示的蓝牙状态信息。

MainActivity.java


package com.blueTooth;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.Menu;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.TextView;
import android.widget.Toast;

import com.blueTooth.R.id;

public class MainActivity extends Activity {

	List<BluetoothDevice> devices=new ArrayList<BluetoothDevice>();
	BluetoothDevice device;
	BluetoothAdapter adapter;
	private CheckBox checkBox;
	private TextView textView;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        checkBox=(CheckBox) findViewById(R.id.checkBox1);
        textView=(TextView) findViewById(id.textView1);

        adapter=BluetoothAdapter.getDefaultAdapter();

        if(adapter==null){
        	checkBox.setEnabled(false);
        	checkBox.setChecked(false);

        	textView.setText("本地无蓝牙设备");
        }else{
        	checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {				
				@Override
				public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
					// TODO Auto-generated method stub
					if(isChecked==false){
						adapter.disable();
						textView.setText("未打开蓝牙");
					}else{
						adapter.enable();
						IntentFilter findintent=new IntentFilter(BluetoothDevice.ACTION_FOUND);
						registerReceiver(finreciver,findintent);
						adapter.startDiscovery();
						if(devices.size()>0){
							textView.setText("列表有数据");
						}else{
							textView.setText("未发现远程蓝牙设备(列表为空)");
						}
					}
				}
			});
        }

    }

    private BroadcastReceiver finreciver=new BroadcastReceiver() {		
		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub
			String action=intent.getAction();
			if(action.equals(BluetoothDevice.ACTION_FOUND)){
				BluetoothDevice device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
				devices.add(device);
			}else if(action.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)){
				Toast.makeText(MainActivity.this, "搜索完成",Toast.LENGTH_SHORT).show();
				System.out.println("搜索完成");
			}
		}
	};
}

activity_main.xml


<RelativeLayout 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" >

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="47dp"
        android:text="CheckBox" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/checkBox1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="110dp"
        android:text="TextView" />

</RelativeLayout>

AndroidManifest.xml


    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>