运用handler更新dialog显示

使用handler更新dialog显示

通过handler结合Html刷新dialog界面的显示内容：

package com.pro.activity;

import java.util.List;

import com.pro.R;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
import android.preference.PreferenceScreen;
import android.text.Html;
import android.text.Spanned;
import android.util.Log;
import android.view.ViewGroup.LayoutParams;
import android.widget.TextView;

public class SensorCheckActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener,SensorEventListener{

?private SharedPreferences sp;
?private SensorManager sManager;
?private Sensor sensor;
?private Spanned msgMes;
?private TextView textView;
?@Override
?protected void onCreate(Bundle savedInstanceState) {
??// TODO Auto-generated method stub
??super.onCreate(savedInstanceState);
??addPreferencesFromResource(R.xml.sensor);
??sp = PreferenceManager.getDefaultSharedPreferences(this);
??sManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
//??sensor = sManager.getDefaultSensor(Sensor.TYPE_ALL);
??
?}
?private Handler handler = new Handler(){
??public void handleMessage(android.os.Message msg) {
???switch (msg.what) {
???case Sensor.TYPE_ACCELEROMETER:
????float[] data = (float[]) msg.obj;
//????msgMes = "X轴方向:"+data[0]+"\nY周方向:"+data[1]+"\nZ轴方向:"+data[2];
????msgMes = Html.fromHtml("<br>&nbsp;&nbsp;&nbsp;X轴方向加速度:"+data[0]+"<br>&nbsp;&nbsp;&nbsp;Y周方向加速度:"+data[1]+"<br>&nbsp;&nbsp;&nbsp;Z轴方向加速度:"+data[2]+"<br>");
????textView.setText(msgMes);
????break;
???case Sensor.TYPE_LIGHT:
????float[] light = (float[]) msg.obj;
????msgMes = Html.fromHtml("<br>&nbsp;&nbsp;&nbsp;当前光线强度:"+light[0]+"<br>");
????textView.setText(msgMes);
????break;
???case Sensor.TYPE_MAGNETIC_FIELD:
????float[] magnetic = (float[]) msg.obj;
????msgMes = Html.fromHtml("<br>&nbsp;&nbsp;&nbsp;X轴方向磁感应:"+magnetic[0]+"<br>&nbsp;&nbsp;&nbsp;Y周方向磁感应:"+magnetic[1]+"<br>&nbsp;&nbsp;&nbsp;Z轴方向磁感应:"+magnetic[2]+"<br>");
????textView.setText(msgMes);
????break;
???case Sensor.TYPE_PROXIMITY:
????float[] proximity = (float[]) msg.obj;
????msgMes = Html.fromHtml("<br>&nbsp;&nbsp;&nbsp;当前近距感应值:"+proximity[0]+"<br>");
????textView.setText(msgMes);
????break;
???case Sensor.TYPE_ORIENTATION:
????float[] orientation = (float[]) msg.obj;
????msgMes = Html.fromHtml("<br>&nbsp;&nbsp;&nbsp;X轴方向:"+orientation[0]+"<br>&nbsp;&nbsp;&nbsp;Y周方向:"+orientation[1]+"<br>&nbsp;&nbsp;&nbsp;Z轴方向:"+orientation[2]+"<br>");
????textView.setText(msgMes);
????break;
???case Sensor.TYPE_PRESSURE:
????float[] pressure = (float[]) msg.obj;
????msgMes = Html.fromHtml("<br>&nbsp;&nbsp;&nbsp;当前压力感应值:"+pressure[0]+"<br>");
????textView.setText(msgMes);
????break;
???case Sensor.TYPE_TEMPERATURE:
????float[] temperaure = (float[]) msg.obj;
????msgMes = Html.fromHtml("<br>&nbsp;&nbsp;&nbsp;当前温度感应值:"+temperaure[0]+"<br>");
????textView.setText(msgMes);
????break;

???default:
????break;
???}
??};
?};
?@Override
?protected void onResume() {
??// TODO Auto-generated method stub
??super.onResume();
??sp.registerOnSharedPreferenceChangeListener(this);
//??sManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_NORMAL);
??
?}
?@Override
?protected void onStop() {
??// TODO Auto-generated method stub
??super.onStop();
??sp.unregisterOnSharedPreferenceChangeListener(this);
?}
?@Override
?protected void onDestroy() {
??// TODO Auto-generated method stub
??super.onDestroy();
//??sManager.unregisterListener(this);
?}
?@Override
?public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
???String key) {
??// TODO Auto-generated method stub
??
?}
?@Override
?public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
???Preference preference) {
??if("key_acceleration".equals(preference.getKey())){//加速度
???showDialogView(this, Sensor.TYPE_ACCELEROMETER, (String) preference.getTitle());
??}else if("key_ray".equals(preference.getKey())){//光线
???showDialogView(this, Sensor.TYPE_LIGHT, (String) preference.getTitle());
??}else if("key_dis".equals(preference.getKey())){//近距
???showDialogView(this, Sensor.TYPE_PROXIMITY, (String) preference.getTitle());
??}else if("key_temperature".equals(preference.getKey())){//温度
???showDialogView(this, Sensor.TYPE_TEMPERATURE, (String) preference.getTitle());
??}else if("key_way".equals(preference.getKey())){//方向
???showDialogView(this, Sensor.TYPE_ORIENTATION, (String) preference.getTitle());
??}else if ("key_magnetic".equals(preference.getKey())) {//磁场
???showDialogView(this, Sensor.TYPE_MAGNETIC_FIELD, (String) preference.getTitle());
??}else if("key_pressure".equals(preference.getKey())){//压力
???showDialogView(this, Sensor.TYPE_PRESSURE, (String) preference.getTitle());
??}
??return super.onPreferenceTreeClick(preferenceScreen, preference);
?}
?@Override
?public void onAccuracyChanged(Sensor sensor, int accuracy) {
??// TODO Auto-generated method stub
??
?}
?@Override
?public void onSensorChanged(SensorEvent event) {
??int type = event.sensor.getType();//.accuracy;
??Message message = new Message();
??switch (type) {
??case Sensor.TYPE_ACCELEROMETER://SensorManager.SENSOR_ACCELEROMETER://加速度
???float[] data = new float[3];
???data[0] = event.values[0]; //x
???data[1] = event.values[1]; //y
???data[2] = event.values[2]; //z轴上的加速度
???message.what = type;
???message.obj = data;
???handler.sendMessage(message);
???break;
??case Sensor.TYPE_ORIENTATION://SensorManager.SENSOR_ORIENTATION://方向
???float[] orientation = new float[3];
???orientation[0] = event.values[0]; //x
???orientation[1] = event.values[1]; //y
???orientation[2] = event.values[2]; //z轴上的方向
???message.what = type;
???message.obj = orientation;
???handler.sendMessage(message);
???break;
??case Sensor.TYPE_PROXIMITY://SensorManager.SENSOR_PROXIMITY://距离
???float[] proximity = new float[1];
???proximity[0] = event.values[0]; //
???message.what = type;
???message.obj = proximity;
???handler.sendMessage(message);
???break;
??case Sensor.TYPE_PRESSURE://Sensor.TYPE_PRESSURE://压力
???float[] pressure = new float[1];
???pressure[0] = event.values[0]; //
???message.what = type;
???message.obj = pressure;
???handler.sendMessage(message);
???break;
??case Sensor.TYPE_LIGHT://SensorManager.SENSOR_LIGHT://光线
???float[] light = new float[1];
???light[0] = event.values[0]; //
???message.what = type;
???message.obj = light;
???handler.sendMessage(message);
???break;
??case Sensor.TYPE_TEMPERATURE://SensorManager.SENSOR_TEMPERATURE://温度
???float[] temperature = new float[1];
???temperature[0] = event.values[0]; //
???message.what = type;
???message.obj = temperature;
???handler.sendMessage(message);
???break;
??case Sensor.TYPE_MAGNETIC_FIELD://磁场
???float[] magnetic = new float[3];
???magnetic[0] = event.values[0]; //x
???magnetic[1] = event.values[1]; //y
???magnetic[2] = event.values[2]; //z轴上的磁感应
???message.what = type;
???message.obj = magnetic;
???handler.sendMessage(message);
???break;

??default:
???break;
??}
?}
?/**
? * 显示不同感应器的测试视图
? */
?private void showDialogView(Context ctx,int sensorType,String msgTitle){
??AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
??if(sManager != null){
//???sensor = sManager.getDefaultSensor(Sensor.TYPE_ALL);
???sensor = sManager.getDefaultSensor(sensorType);
???if(sensor != null){
????
????sManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_NORMAL);
???}else{//手机不支持此类感应器类型
????msgMes = Html.fromHtml("<br>&nbsp;&nbsp;该手机不支持此类感应器类型");
????builder.setMessage(msgMes);
???}
??}
??textView = new TextView(ctx);
??LayoutParams lp = new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);
??textView.setLayoutParams(lp);
??
??builder.setTitle(msgTitle);
??builder.setIcon(R.drawable.icon);
//??builder.setMessage(msgMes);
??builder.setView(textView);
??builder.setNegativeButton("确定", new DialogInterface.OnClickListener() {
???
???@Override
???public void onClick(DialogInterface dialog, int which) {
????sManager.unregisterListener(SensorCheckActivity.this);
???}
??});
??builder.show()
??.setOnShowListener(new DialogInterface.OnShowListener() {
???
???@Override
???public void onShow(DialogInterface dialog) {
????textView.setText(msgMes);
???}
??});
??
?}
}

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