import java.util.Calendar;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.provider.Settings.System;
import android.widget.ImageView;
public class TestMyGPS extends Activity {
private static final String TAG = "TestMyGPS";
Button mButton;
TextView tv1;
TextView mStatus;
TextView mTemp;
LocationManager mlm;
LocationListener locationListener;
String mFilter;
Calendar c = Calendar.getInstance();
// public String str1 = "《Android/OPhone开发完全讲义》";
// String str1 = "《Android/OPhone开发完全讲义》"; 在前面加不加Public，效果都一样
//public static String str1 = "《Android/OPhone开发完全讲义》";
public static String str1 = "《Android/OPhone开发完全讲义》";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 定义UI组件
mButton = (Button) findViewById(R.id.button1);
tv1 = (TextView) findViewById(R.id.textView1);
mStatus = (TextView) findViewById(R.id.show_status);
mTemp = (TextView) findViewById(R.id.temp_text);
mButton.setOnClickListener(new View.OnClickListener() {
public void onClick(android.view.View view) {
// 转至 GPS 设置界面
Intent intent = new Intent(Settings.ACTION_SECURITY_SETTINGS);
startActivityForResult(intent, 0);
}
});
// 获取LocationManager对象
mlm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// 定义Criteria对象
// 获取GPS信息提供者
Criteria filter = getFilter();
mFilter = mlm.getBestProvider(filter, true);
// try {
// mlm.setTestProviderEnabled(mFilter, true);
// } catch (IllegalArgumentException e) {
// String err = "IllegalArgumentException=" + e.getMessage();
// Log.e(TAG, err);
// Toast.makeText(this, err, Toast.LENGTH_LONG).show();
// }
// openGPS();
gpsStatus();
// 位置监听器
locationListener = new LocationListener() {
// 当位置改变时触发
public void onLocationChanged(Location location) {
updateLocation(location);
Toast.makeText(TestMyGPS.this, "onLocationChanged=" + location, Toast.LENGTH_LONG).show();
gpsStatus();
mTemp.setText("onLocationChanged="+location);
}
// Provider失效时触发
public void onProviderDisabled(String arg0) {
gpsStatus();
mTemp.setText("onProviderDisabled=" + arg0);
}
// Provider可用时触发
public void onProviderEnabled(String arg0) {
gpsStatus();
mTemp.setText("onProviderEnabled=" + arg0);
}
// Provider状态改变时触发
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
mTemp.setText("onStatusChanged=" + arg0);
}
};
// 500毫秒更新一次，忽略位置变化
mlm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 500, 3, locationListener);
}
private void openGPS() {
// if (mlm.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
// Toast.makeText(this, " 位置源已设置！ ", Toast.LENGTH_SHORT).show();
// return;
// }
//
// Toast.makeText(this, " 位置源未设置！ ", Toast.LENGTH_SHORT).show();
}
private Criteria getFilter() {
Criteria criteria = new Criteria();
// 设置定位精确度 Criteria.ACCURACY_COARSE 比较粗略， Criteria.ACCURACY_FINE则比较精细
criteria.setAccuracy(Criteria.ACCURACY_FINE);
// 设置是否需要海拔信息 Altitude
criteria.setAltitudeRequired(false);
// 设置是否需要方位信息 Bearing
criteria.setBearingRequired(false);
// 设置是否允许运营商收费
criteria.setCostAllowed(true);
// 设置对电源的需求
criteria.setPowerRequirement(Criteria.POWER_LOW);
return criteria;
}
private void gpsStatus() {
if (mlm.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
mStatus.setText("GPS开启");
} else {
mStatus.setText("GPS未开启");
Toast.makeText(this, " 位置源未设置！ ", Toast.LENGTH_SHORT).show();
// 转至 GPS 设置界面
Intent intent = new Intent(Settings.ACTION_SECURITY_SETTINGS);
startActivityForResult(intent, 0);
}
}
// 更新位置信息
private void updateLocation(Location location) {
if (location != null) {
tv1.setText("更新位置：" + location.toString() + "\n\t其中经度：" + location.getLongitude() + "\n\t其中纬度："
+ location.getLatitude());
try
{
FileOutputStream fos = new FileOutputStream(
android.os.Environment.getExternalStorageDirectory()
+ "/file.txt");
// InputStream is = getResources().getAssets().open("file.txt");
// byte[] buffer = new byte[8192];
// int count = 0;
// while ((count = is.read(buffer)) >= 0)
// {
// fos.write(buffer, 0, count);
// }
// String str1 = "《Android/OPhone开发完全讲义》";这个语句放在这个地方，只能在这个函数内部使用，
//但是放到主Activity里， 我们就可以在所有地方使用。 类似全局变量的使用。
str1= Integer.toString(c.get(Calendar.MONTH))+Integer.toString(c.get(Calendar.DAY_OF_MONTH))+ Integer.toString(c.get(Calendar.HOUR_OF_DAY))+Integer.toString(c.get(Calendar.MINUTE))+Double.toString(location.getLongitude())+","+Double.toString(location.getLatitude())+";";
Toast.makeText(this,str1, Toast.LENGTH_LONG).show();
fos.write(str1.getBytes("utf-8"));
fos.close();
// is.close();
Toast.makeText(this, "已成功地将经纬度数据将写到SD卡上的文件中.", Toast.LENGTH_LONG).show();
}
catch (Exception e)
{
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
} else {
tv1.setText("更新位置失败");
}
}
public void onClick_SaveImageToSDCard(View view)
{
try
{
FileOutputStream fos = new FileOutputStream(
android.os.Environment.getExternalStorageDirectory()
+ "/file.txt");
InputStream is = getResources().getAssets().open("file.txt");
byte[] buffer = new byte[8192];
int count = 0;
while ((count = is.read(buffer)) >= 0)
{
fos.write(buffer, 0, count);
}
// String str1 = "《Android/OPhone开发完全讲义》";这个语句放在这个地方，只能在这个函数内部使用，
//但是放到主Activity里， 我们就可以在所有地方使用。 类似全局变量的使用。
fos.write(str1.getBytes("utf-8"));
fos.close();
is.close();
Toast.makeText(this, "已成功将文件写到SD卡上.", Toast.LENGTH_LONG).show();
}
catch (Exception e)
{
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
}
public void onClick_ReadImageFromSDCard(View view)
{
String filename = android.os.Environment.getExternalStorageDirectory()
+ "/file.txt";
if (!new File(filename).exists())
{
Toast.makeText(this, "还没有往SD卡写入文件", Toast.LENGTH_LONG).show();
return;
}
//ImageView imageView = (ImageView) findViewById(R.id.imageview);
TextView textView = (TextView)findViewById(R.id.textview);
try
{
FileInputStream fis = new FileInputStream(filename);
//Bitmap bitmap = BitmapFactory.decodeStream(fis);
//imageView.setImageBitmap(bitmap);
//fis.close();
//?InputStream is = openFileInput("file.txt");
byte[] buffer = new byte[8192];
int byteCount = fis.read(buffer);
String str2 = new String(buffer, 0, byteCount, "utf-8");
//TextView textView = (TextView)findViewById(R.id.textview);
textView.setText(str2);
fis.close();
}
catch (Exception e)
{
// TODO: handle exception
}
}
@Override
protected void onDestroy() {
mlm.removeUpdates(locationListener);
// mlm.setTestProviderEnabled(mFilter, false);
super.onDestroy();
}
}
