蓝牙实战(一)

来源：互联网发布：淘宝买身份证编辑：程序博客网时间：2024/04/30 08:36

一.概述

在前面的三篇文章讲解蓝牙开发，写的比较详细，篇幅比较长，后面这几篇来点简单实用的，先看效果图
这里写图片描述

二.代码

代码如下：

BlueToothController 控制蓝牙操作

public class BlueToothController {    private BluetoothAdapter mAdapter;    public BlueToothController() {        mAdapter = BluetoothAdapter.getDefaultAdapter();    }    /**     * 是否支持蓝牙     * @return true 支持 false 不支持     */    public boolean isSupportBlueTooth() {       if( mAdapter != null ){           return true;       }        else {           return false;       }    }    /**     * 获取蓝牙状态     * @return     */    public boolean getBlueToothStatus() {        assert (mAdapter != null);        return mAdapter.isEnabled();    }    /**     * 打开蓝牙     * @param activity     * @param requestCode     */    public void turnOnBlueTooth(Activity activity, int requestCode) {        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);        activity.startActivityForResult(intent, requestCode);//        mAdapter.enable();    }    /**     * 关闭蓝牙     */    public void turnOffBlueTooth() {        mAdapter.disable();    }}

public class MainActivity extends ActionBarActivity {    public static final int REQUEST_CODE = 0;    private BlueToothController mController = new BlueToothController();    private Toast mToast;    /**     * 监听蓝牙开关的广播     */    private BroadcastReceiver receiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,-1);            switch (state) {                case BluetoothAdapter.STATE_OFF:                    showToast("STATE_OFF");                    break;                case BluetoothAdapter.STATE_ON:                    showToast("STATE_ON");                    break;                case BluetoothAdapter.STATE_TURNING_ON:                    showToast("STATE_TURNING_ON");                    break;                case BluetoothAdapter.STATE_TURNING_OFF:                    showToast("STATE_TURNING_OFF");                    break;                default:                    showToast("Unkown STATE");                    break;            }        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);        registerReceiver(receiver, filter);    }    @Override    protected void onDestroy() {        unregisterReceiver(receiver);        super.onDestroy();    }    public void isSupportBlueTooth(View view) {        boolean ret = mController.isSupportBlueTooth();        showToast("support Bluetooth? " + ret);    }    public void isBlueToothEnable(View view) {        boolean ret = mController.getBlueToothStatus();        showToast("Bluetooth enable？" + ret);    }    public void requestTurnOnBlueTooth(View view) {        mController.turnOnBlueTooth(this, REQUEST_CODE);    }    public void turnOffBlueTooth(View view) {        mController.turnOffBlueTooth();    }    private void showToast(String text) {        if( mToast == null) {            mToast = Toast.makeText(this, text, Toast.LENGTH_SHORT);        }        else {            mToast.setText(text);        }        mToast.show();    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        //当发起请求蓝牙打开事件时，会告诉你用户选择的结果        if( resultCode == RESULT_OK) {            showToast("打开成功");        }        else {            showToast("打开失败");        }    }}

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