我完全是Android app dev的新手。我正在尝试点击一个按钮打开电话簿（联系人）;之后，我应该能够从列表中选择一个或多个联系人。之后，将变量中存储的数字作为包含一个或多个数字的字符串（取决于选择的数量）得到的东西 - （“+ XX XXX XXX，+ XX XXX xXX”）
我看到了很多代码，但我无法实现其中的任何工作。
整个代码
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Contacts.People;
import android.provider.ContactsContract;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.telephony.SmsManager;
public class AndroidGPSTrackingActivity extends Activity {
private static final int PICK_CONTACT = 0;
protected static final int CHOOSE_CONTACTS = 0;
Button btnShowLocation;
// GPSTracker class
GPSTracker gps;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnShowLocation = (Button) findViewById(R.id.btnShowLocation);
// show location button click event
btnShowLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// create class object
gps = new GPSTracker(AndroidGPSTrackingActivity.this);
// check if GPS enabled
if(gps.canGetLocation()){
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
String StringLong = decimalToDMS(longitude);
String StringLati = decimalToDMS(latitude);
// \n is for new line
Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + StringLati + "\nLong: " + StringLong, Toast.LENGTH_LONG).show();
//SENDING SMS CODE START
String phoneNumber = "5556";
String message = "Moja GPS Lokacija je " + latitude + " " + longitude;
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phoneNumber, null, message, null, null);
//SENDING SMS CODE END
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
}
});
// get contacts
//Button Click
View addNewContact;
addNewContact.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
startActivityForResult(intent, CHOOSE_CONTACTS);
}
});
//Button click end
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
startActivityForResult(intent, PICK_CONTACT);
public void onActivityResult(int reqCode, int resultCode, Intent data) {
super.onActivityResult(reqCode, resultCode, data);
switch (reqCode) {
case (PICK_CONTACT) :
if (resultCode == Activity.RESULT_OK) {
Uri contactData = data.getData();
Cursor c = getContentResolver().query(contactData, null, null, null, null);
if (c.moveToFirst()) {
String name = c.getString(c.getColumnIndexOrThrow(People.NAME));
String number = c.getString(c.getColumnIndexOrThrow(People.NUMBER));
TextView perrsonname;
perrsonname.setText(name);
Toast.makeText(this, name + " has number " + number, Toast.LENGTH_LONG).show();
}
}
break;
}
}
//end contacts
}
String decimalToDMS(double coord) {
String output, degrees, minutes, seconds;
// gets the modulus the coordinate divided by one (MOD1).
// in other words gets all the numbers after the decimal point.
// e.g. mod := -79.982195 % 1 == 0.982195
//
// next get the integer part of the coord. On other words the whole
// number part.
// e.g. intPart := -79
double mod = coord % 1;
int intPart = (int) coord;
// set degrees to the value of intPart
// e.g. degrees := "-79"
degrees = String.valueOf(intPart);
// next times the MOD1 of degrees by 60 so we can find the integer part
// for minutes.
// get the MOD1 of the new coord to find the numbers after the decimal
// point.
// e.g. coord := 0.982195 * 60 == 58.9317
// mod := 58.9317 % 1 == 0.9317
//
// next get the value of the integer part of the coord.
// e.g. intPart := 58
coord = mod * 60;
mod = coord % 1;
intPart = (int) coord;
if (intPart < 0) {
// Convert number to positive if it's negative.
intPart *= -1;
}
// set minutes to the value of intPart.
// e.g. minutes = "58"
minutes = String.valueOf(intPart);
// do the same again for minutes
// e.g. coord := 0.9317 * 60 == 55.902
// e.g. intPart := 55
coord = mod * 60;
intPart = (int) coord;
if (intPart < 0) {
// Convert number to positive if it's negative.
intPart *= -1;
}
// set seconds to the value of intPart.
// e.g. seconds = "55"
seconds = String.valueOf(intPart);
// I used this format for android but you can change it
// to return in whatever format you like
// e.g. output = "-79/1,58/1,56/1"
output = degrees + "° " + minutes + "' " + seconds + " \" ";
// Standard output of DMS
// output = degrees + "°" + minutes + "'" + seconds + "\"";
return output;
}
}
XML文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="80dp"
android:src="@drawable/ic_launcher"
android:contentDescription="@string/plex_logo_description" />
<Button
android:id="@+id/btnShowLocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="30dp"
android:text="@string/sendLocation"
android:background="#70bcba"
android:padding="10dp"
android:textColor="#fff"
android:textStyle="bold"
/>
<Button
android:id="@+id/addNewContact"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/btnShowLocation"
android:layout_centerHorizontal="true"
android:layout_marginBottom="60dp"
android:text="@string/choose_contact"
android:onClick="addNewContact"
/>
</RelativeLayout>
答案 0 :(得分：0)
这将打开联系人以选择号码
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
startActivityForResult(intent, PICK_CONTACT);
现在使用onActivityResult获取联系
public void onActivityResult(int reqCode, int resultCode, Intent data) {
super.onActivityResult(reqCode, resultCode, data);
switch (reqCode) {
case (PICK_CONTACT) :
if (resultCode == Activity.RESULT_OK) {
Uri contactData = data.getData();
Cursor c = getContentResolver().query(contactData, null, null, null, null);
if (c.moveToFirst()) {
String name = c.getString(c.getColumnIndexOrThrow(People.NAME));
String number = c.getString(c.getColumnIndexOrThrow(People.NUMBER));
perrsonname.setText(name);
Toast.makeText(this, name + " has number " + number, Toast.LENGTH_LONG).show();
}
}
break;
}
}
不要忘记添加阅读联系人权限。
更新： -
在oncreate()内添加以下内容并从我的回答中删除以前的代码。
Button addNewContact = (Button) findViewById(R.id.addNewContact);
addNewContact.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
startActivityForResult(intent, CHOOSE_CONTACTS);
}
});
将评论get contacts中的代码移至end contacts。