編輯:關於Android編程
本文實例講述了Android編程之藍牙測試。分享給大家供大家參考。具體分析如下:
一、軟件平台:
win7 + eclipse + sdk
二、設計思路:
配合倒計時定時器實現藍牙打開,可見,掃描三個功能
三、源代碼:
main.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:text="TextView" android:layout_height="wrap_content"></TextView> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout1"> <Button android:id="@+id/button1" android:text="OFF" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout2"> <Button android:id="@+id/button2" android:text="開啟可見 " android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="設備不可見 "></TextView> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout3"> <Button android:id="@+id/button3" android:text="掃描:OFF" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> <TextView android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止掃描 "></TextView> </LinearLayout> <ListView android:id="@+id/listView1" android:layout_height="wrap_content" android:layout_width="match_parent"></ListView> </LinearLayout>
test_bluetooth.java:
package com.test_bluetooth; import java.util.Set; 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.os.Bundle; import android.os.CountDownTimer; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.TextView; public class test_bluetooth extends Activity implements View.OnClickListener { private static final int REQUEST_ENABLE_BT = 2; TextView txt; TextView txt_see; TextView txt_scan; BluetoothAdapter mBluetoothAdapter; ArrayAdapter<String> mArrayAdapter; Button btn_switch; Button btn_see; Button btn_scan; ListView list; CountDownTimer see_timer; CountDownTimer scan_timer; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); txt = (TextView)findViewById(R.id.textView1); txt_see = (TextView)findViewById(R.id.textView2); txt_scan = (TextView)findViewById(R.id.textView3); //綁定XML中的ListView,作為Item的容器 list = (ListView) findViewById(R.id.listView1); //獲取藍牙適配器 mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); mArrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1); if (mBluetoothAdapter == null) { // Device does not support Bluetooth txt.setText("fail"); //退出程序 test_bluetooth.this.finish(); } btn_switch = (Button)findViewById(R.id.button1); btn_switch.setOnClickListener(this); btn_see = (Button)findViewById(R.id.button2); btn_see.setOnClickListener(this); btn_see.setEnabled(false); btn_scan = (Button)findViewById(R.id.button3); btn_scan.setOnClickListener(this); btn_scan.setText("掃描:OFF"); btn_scan.setEnabled(false); //判斷藍牙是否已經被打開 if (mBluetoothAdapter.isEnabled()) { //打開 btn_switch.setText("ON"); btn_see.setEnabled(true); btn_scan.setEnabled(true); } see_timer = new CountDownTimer(120000,1000) { @Override public void onTick( long millisUntilFinished) { txt_see.setText( "剩余可見時間" + millisUntilFinished / 1000 + "秒"); } @Override public void onFinish() { //判斷藍牙是否已經被打開 if (mBluetoothAdapter.isEnabled()) { btn_see.setEnabled(true); txt_see.setText( "設備不可見"); } } }; scan_timer = new CountDownTimer(12000,1000) { @Override public void onTick( long millisUntilFinished) { txt_scan.setText( "剩余掃描時間" + millisUntilFinished / 1000 + "秒"); } @Override public void onFinish() { //判斷藍牙是否已經被打開 if (mBluetoothAdapter.isEnabled()) { btn_scan.setEnabled(true); //關閉掃描 mBluetoothAdapter.cancelDiscovery(); btn_scan.setText("掃描:OFF"); txt_scan.setText( "停止掃描"); } } }; } @Override protected void onDestroy() { super.onDestroy(); android.os.Process.killProcess(android.os.Process.myPid()); } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.button1: { String str = btn_switch.getText().toString(); if (str == "OFF") { if (!mBluetoothAdapter.isEnabled()) { //打開藍牙 Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT); txt.setText("s1"); btn_see.setEnabled(true); btn_scan.setText("掃描:OFF"); btn_scan.setEnabled(true); } } else { //關閉藍牙 mBluetoothAdapter.disable(); btn_switch.setText("OFF"); mArrayAdapter.clear(); list.setAdapter(mArrayAdapter); btn_see.setEnabled(false); btn_scan.setEnabled(false); } break; } case R.id.button2: { //開啟可見 Intent enableBtIntent_See = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); startActivityForResult(enableBtIntent_See, 3); txt.setText("s1"); btn_see.setEnabled(false); see_timer.start(); break; } case R.id.button3: { String str = btn_scan.getText().toString(); if (str == "掃描:OFF") { txt.setText("s5"); if (mBluetoothAdapter.isEnabled()) { //開始掃描 mBluetoothAdapter.startDiscovery(); txt.setText("s6"); btn_scan.setText("掃描:ON"); // Create a BroadcastReceiver for ACTION_FOUND final BroadcastReceiver mReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { // TODO Auto-generated method stub String action = intent.getAction(); // When discovery finds a device mArrayAdapter.clear(); if (BluetoothDevice.ACTION_FOUND.equals(action)) { // Get the BluetoothDevice object from the Intent BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); // Add the name and address to an array adapter to show in a ListView mArrayAdapter.add(device.getName() + ":" + device.getAddress()); } list.setAdapter(mArrayAdapter); } }; // Register the BroadcastReceiver IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); registerReceiver(mReceiver, filter); // Don't forget to unregister during onDestroy scan_timer.start(); } } else { //關閉掃描 mBluetoothAdapter.cancelDiscovery(); btn_scan.setText("掃描:OFF"); scan_timer.cancel(); txt_scan.setText( "停止掃描"); } break; } default: break; } } public void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case REQUEST_ENABLE_BT: // When the request to enable Bluetooth returns if (resultCode == Activity.RESULT_OK) { // Bluetooth is now enabled, so set up a chat session btn_switch.setText("ON"); txt.setText("s4"); //獲取藍牙列表 Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices(); mArrayAdapter.clear(); // If there are paired devices if (pairedDevices.size() > 0) { //txt.setText("s3"); // Loop through paired devices for (BluetoothDevice device : pairedDevices) { // Add the name and address to an array adapter to show in a ListView mArrayAdapter.add(device.getName() + ":" + device.getAddress()); } list.setAdapter(mArrayAdapter); } } else { finish(); } } } }
效果圖如下:
希望本文所述對大家的Android程序設計有所幫助。
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