[转]大话企业级Android应用开发实战传感器

37 “机器人”的第六感——传感器

下面给出一个Demo结合理解一下传感器的简单应用。

public class MainActivity extends Activity implements SensorEventListener{

final String TAG = "Sensor";

SensorManager smanager = null;

Sensor sensor = null;

TextView TextInfo = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

//获得传感器的服务

smanager = (SensorManager) getSystemService(Context.SENSOR_

SERVICE);

//定义一个TextView，显示数据的变化

TextInfo = (TextView)findViewById(R.id.info);

}

@Override

protected void onResume() {

super.onResume();

//注册关于传感器的Listener，关于方位与加速度的传感器

smanager.registerListener( this, smanager.getDefaultSensor

(SensorManager.SENSOR_ACCELEROMETER | SensorManager.SENSOR_ORIENTATION),

SensorManager.SENSOR_DELAY_NORMAL);

}

@Override

public void onSensorChanged(SensorEvent event) {

float[] values = event.values;

synchronized (this){

StringBuffer sb = new StringBuffer();

sb.append("坐标 X:").append(values[0]).append("\n");

sb.append("坐标 Y:").append(values[1]).append("\n");

sb.append("坐标 Z:").append(values[2]).append("\n");

TextInfo.setText(sb.toString());

}

@Override

public void onAccuracyChanged(Sensor sensor, int accuracy) {

Log.d(TAG,"传感器: Sensor" + sensor.getName() );

}

@Override

protected void onStop() {

super.onStop();

smanager.unregisterListener(this);

}

38 “机器人”通信的核心——SIM卡

（2）编写代码。

编写MainActivity.java：

public class MainActivity extends Activity {

private TelephonyManager phoneManager;

private TextView simView;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

//获得电话相关信息的系统级的服务

phoneManager = (TelephonyManager) getSystemService

(TELEPHONY_SERVICE);

//获得sim卡相关信息

String info = getInfo(phoneManager);

simView = (TextView)findViewById(R.id.siminfo);

simView.setText(info);

}

由于获得TelephonyManager信息代码过于拖沓，在这里推荐使用MVC模式，将相关方法放入业务层，或者单独作为一个方法使用。

public static String getInfo(TelephonyManager tM){

StringBuffer sb = new StringBuffer();

//获得SIM卡当前状态

sb.append("SIM当前状态:");

if(tM.getSimState()==TelephonyManager.SIM_STATE_READY)

{

sb.append("正常").append("\n\n");

}

else if(tM.getSimState()==TelephonyManager.SIM_STATE_ABSENT)

{

sb.append("N/A:无SIM卡").append("\n\n");

}

else

{

sb.append("N/A:SIM状态异常").append("\n\n");

}

//获得SIM卡编号

sb.append("SIM编号:");

if(tM.getSimSerialNumber()!=null)

{

sb.append(tM.getSimSerialNumber()).append("\n\n");

}

else

{

sb.append("N/A：获取失败").append("\n\n");

}

//取得SIM卡运营商代码

sb.append("SIM运营商代码:");

if(tM.getSimOperator().equals(""))

{

sb.append("N/A：获取失败").append("\n\n");

}

else

{

sb.append(tM.getSimOperator()).append("\n\n");

}

//获得SIM卡运营商名称

sb.append("SIM运营商名称:");

if(tM.getSimOperatorName().equals(""))

{

sb.append("N/A：获取失败").append("\n\n");

}

else

{

sb.append(tM.getSimOperatorName()).append("\n\n");

}

//获得SIM卡所属国家

sb.append("SIM所属国家:");

if(tM.getSimCountryIso().equals(""))

{

sb.append("N/A:获取失败").append("\n\n");

}

else

{

sb.append(tM.getSimCountryIso()).append("\n\n");

}

//获得手机号码

sb.append("手机号码:");

if(tM.getLine1Number()!=null)

{

sb.append(tM.getLine1Number()).append("\n\n");

}

else

{

sb.append("N/A：获取失败").append("\n\n");

}

return sb.toString();

}

（3）因为要获得相关电话的信息，所以需要在AndroidManifest.xml中添加相关权限

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

39 让数据在空中传递——蓝牙

MainActivity.java代码如下：

public class MainActivity extends Activity {

//取得默认的蓝牙适配器

private BluetoothAdapter blueAdapter = BluetoothAdapter.

getDefaultAdapter();

//存储搜索到的可连接设备

private List<BluetoothDevice> devicesList = new ArrayList

<BluetoothDevice>();

private int REQUEST_ENABLE_BT = 1;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

//检测蓝牙适配器工作是否正常，异常则提示用户

//检测蓝牙适配器是否开启，没有则进行开启

if (blueAdapter == null) {

showToast("请检查你的设备是否具有蓝牙模块或是否正常");

finish();

}

else if (!blueAdapter.isEnabled()) {

Intent enableBtIntent = new Intent(BluetoothAdapter.

ACTION_REQUEST_ENABLE);

startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);

}

//开始搜索

private void doDiscovery() {

blueAdapter.startDiscovery();

}

@Override

protected void onStart() {

super.onStart();

//注册接收器

Intent discoverableIntent = new

Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);

//开启搜索看见模式，最大时间为300秒

discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DUR

ATION, 300);

startActivity(discoverableIntent);

IntentFilter discoveryFilter = new IntentFilter(BluetoothAdapter.

ACTION_DISCOVERY_FINISHED);

registerReceiver(discovery_R, discoveryFilter);

IntentFilter foundFilter = new IntentFilter(BluetoothDevice.

ACTION_FOUND);

registerReceiver(found_R, foundFilter);

doDiscovery();

}

public void showToast(String string){

Toast.makeText(MainActivity.this, string, Toast.LENGTH_LONG).

show();

}

@Override

protected void onDestroy() {

super.onDestroy();

if (blueAdapter != null) {

blueAdapter.cancelDiscovery();

blueAdapter.disable();

}

//向列表中添加已配对的设备

private void addpaired(){

Set<BluetoothDevice> pairedDevices = blueAdapter.

getBondedDevices();

if (pairedDevices.size() > 0) {

for (BluetoothDevice device : pairedDevices) {

devicesList.add(device);

}

//广播接收者：当搜索到设备时调用

BroadcastReceiver found_R = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

/* 从intent中取得搜索结果数据 */

BluetoothDevice device = intent

.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

/* 将结果添加到列表中 */

devicesList.add(device);

}

};

//广播接收者：当搜索结束时调用

BroadcastReceiver discovery_R = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent)

{

//在停止搜索后，追加已配对的设备

addpaired();

/* 卸载注册的接收器 */

unregisterReceiver(found_R);

unregisterReceiver(this);

}

};

}

40 安装外部程序

编写strings.xml：

<?xml version="1.0" encoding="utf-8"?>

<string name="hello">Hello World, ApkInstallerActivity!</string>

<string name="app_name">APK安装器</string>

<string name="path">你要安装的APK文件名：</string>

</resources>

编写main.xml文件：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/path"

<EditText

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="MyMusicPlayer.apk"

android:id="@+id/filename"

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/start"

android:id="@+id/button"

</LinearLayout>

编写InstallActivity.java类：

package com.sharpandroid.apkinstaller;

import java.io.File;

import android.app.Activity;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

public class ApkInstallerActivity extends Activity {

private EditText filenameText ;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button button = (Button) this.findViewById(R.id.button);

filenameText = (EditText) this.findViewById(R.id.filename);

button.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

String filename = filenameText.getText().toString();

Intent intent = new Intent();

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

intent.setAction(android.content.Intent.ACTION_VIEW);

intent.setDataAndType(

Uri.fromFile(new File(Environment.

getExternalStorageDirectory(), filename)

), "application/vnd.android.package-archive");

startActivity(intent);

}

});

}

添加权限，功能清单文件如下：

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.sharpandroid.apkinstaller"

android:versionCode="1"

android:versionName="1.0">

<application android:icon="@drawable/icon" android:label=

"@string/app_name">

<activity android:name=".ApkInstallerActivity"

android:label="@string/app_name">

<intent-filter>

</intent-filter>

</activity>

</application>

<uses-permission android:name="android.permission.MOUNT_

UNMOUNT_FILESYSTEMS"/>

<uses-permission android:name="android.permission.WRITE_

EXTERNAL_STORAGE"/>

<uses-permission android:name="android.permission.INSTALL_

PACKAGES"/>

<uses-sdk android:minSdkVersion="7" />

</manifest>

posted @ 2013-06-11 22:28 火腿骑士阅读(153) 评论(0) 编辑收藏举报

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[转]大话企业级Android应用开发实战 传感器

37 “机器人”的第六感——传感器

38 “机器人”通信的核心——SIM卡

39 让数据在空中传递——蓝牙

40 安装外部程序

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[转]大话企业级Android应用开发实战传感器