android 藍芽搜尋功能實現
阿新 • • 發佈：2019-01-31
MainActivity.java
package com.example.bluefind; import android.media.AudioManager; import android.os.Bundle; import android.app.Activity; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.util.Log; import android.view.KeyEvent; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import android.widget.AdapterView.OnItemClickListener; public class MainActivity extends Activity { private BlueFindReceiver mBFR; private Button bt_start; private Button bt_stop; private BluetoothAdapter mBtAdapter; private ListView newDevice; private ArrayAdapter<String> mNewDevicesArrayAdapter; private LinearLayout mliLayout; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); bt_start = (Button) findViewById(R.id.start); bt_stop = (Button) findViewById(R.id.stop); mliLayout = (LinearLayout) findViewById(R.id.progress_bar); initListView(); mBFR = new BlueFindReceiver(); final IntentFilter mFilter = new IntentFilter(); mFilter.addAction(BluetoothDevice.ACTION_FOUND); mFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); mBtAdapter = BluetoothAdapter.getDefaultAdapter(); newDevice.setOnItemClickListener(mDeviceClickListener) ; bt_start.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if(mBtAdapter == null){ Toast.makeText(getApplicationContext(), "此裝置不支援藍芽", Toast.LENGTH_SHORT).show(); return; } mNewDevicesArrayAdapter.clear(); mliLayout.setVisibility(View.VISIBLE); getApplication().registerReceiver(mBFR, mFilter); startFind(); } }); bt_stop.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub stopFind(); getApplication().unregisterReceiver(mBFR); mliLayout.setVisibility(View.GONE); } }); } private void initListView() { // TODO Auto-generated method stub newDevice = (ListView) findViewById(R.id.new_devices); mNewDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name); newDevice.setAdapter(mNewDevicesArrayAdapter); } protected void stopFind() { // TODO Auto-generated method stub mBtAdapter.cancelDiscovery(); if (mNewDevicesArrayAdapter.getCount() == 0) { String noDevices = "很抱歉沒有找到!!"; mNewDevicesArrayAdapter.add(noDevices); } } protected void startFind() { // TODO Auto-generated method stub if (mBtAdapter.isDiscovering()) { mBtAdapter.cancelDiscovery(); } Log.i("zpf ", "start.........discovery"); mBtAdapter.startDiscovery(); } class BlueFindReceiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (BluetoothDevice.ACTION_FOUND.equals(action)) { BluetoothDevice device = intent .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); Log.i("zpf onReceive ","name -> "+device.getName()); if (device.getBondState() != BluetoothDevice.BOND_BONDED) //通過此方法去判斷，哪個裝置連線了，重新整理連線的檢視bug { mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress()); } } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) { Log.i("zpf onReceive ","zpf "+action); mliLayout.setVisibility(View.GONE); if (mNewDevicesArrayAdapter.getCount() == 0) { String noDevices = "很抱歉沒有找到!!"; mNewDevicesArrayAdapter.add(noDevices); } } } } private OnItemClickListener mDeviceClickListener = new OnItemClickListener() { public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) { mBtAdapter.cancelDiscovery(); String info = ((TextView) v).getText().toString(); String address = info.substring(info.length() - 17); BluetoothDevice device = BluetoothAdapter.getDefaultAdapter() .getRemoteDevice(address); // mChatService.connect(device); //開始連線 //顯示一個view //連線狀態發生了改變 //取消顯示 } }; //測試藍芽音樂bug的一些api private AudioManager audioManager; @SuppressWarnings("deprecation") public void testAudio(){ //還有這種STREAM_BLUETOOTH_SCO 流，關於藍芽通話的。7 audioManager = (AudioManager) getApplication().getSystemService(this.AUDIO_SERVICE); audioManager.isBluetoothA2dpOn(); //判斷a2dp狀態，正確處理獲取音訊焦點(暫停，播放)的問題 audioManager.setBluetoothA2dpOn(true);//設定A2dp的開關，去實現，手機端播放(沒有聲音)，裝置不發聲的問題 // audioManager. setStreamMute(AudioManager.str,booleanstate) //把鈴聲，媒體，鬧鐘，通話，系統的聲音中的某一種切換到靜音 audioManager.getMode();//得到當前的聲音模式。 audioManager.isBluetoothScoOn(); audioManager.isBluetoothScoAvailableOffCall(); audioManager.isSpeakerphoneOn(); audioManager.isMusicActive(); // audioManager.setBluetoothScoOn(on) } int count = -1; // @Override // public boolean dispatchKeyEvent(KeyEvent event) { // // int action = event.getAction(); // // if (action ==KeyEvent.ACTION_DOWN) { // Log.i("zpf","+++++++++ACTION_DOWN++++++"+ count++); // return true; // } // // if (action == KeyEvent.ACTION_UP) { // Log.i("zpf","+++++ACTION_UP++++++++++"); // return true; // } // // return super.dispatchKeyEvent(event); // } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_VOLUME_DOWN: Log.i("zpf","-----------------"+count); count--; return true; case KeyEvent.KEYCODE_VOLUME_UP: Log.i("zpf","++++++++++++++++"+ count); count++; return true; case KeyEvent.KEYCODE_VOLUME_MUTE: Log.i("zpf","MUTE"); return true; } return super.onKeyDown(keyCode, event); } }
activity_main.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" > <Button android:id="@+id/start" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="開始搜尋" /> <Button android:id="@+id/stop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止搜尋" /> <FrameLayout android:id="@+id/myview" android:layout_width="match_parent" android:layout_height="200dp" > <ListView android:id="@+id/new_devices" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="2" /> <LinearLayout android:layout_width="match_parent" android:layout_height="150dp" android:id="@+id/progress_bar" android:background="@android:color/black" android:alpha="0.4" android:visibility="gone"> <ProgressBar android:layout_width="100dp" android:layout_height="100dp" android:layout_marginLeft="150dp" android:layout_marginTop="20dp" /> </LinearLayout> </FrameLayout> </LinearLayout>
device_name.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp"
android:padding="5dp"
/>