我正在尝试从默认活动中调用一个活动但是当触发调用活动时，我的应用程序崩溃并关闭此消息07-06 11:54:59.291: E/MapActivity(366): Couldn't get connection factory client。这是我调用活动的当前代码
public class GMapsActivity extends MapActivity {
EditText password;
Button login;
MapView mapView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initcontrols();
}
public void initcontrols()
{
password=(EditText)findViewById(R.id.pass);
login=(Button)findViewById(R.id.login);
mapView=(MapView)findViewById(R.id.map_view);
login.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v)
{
Intent myIntent = null;
if(password.getText().toString().equals("admin")) {
System.out.println("Entering");
mapView.setVisibility(View.VISIBLE);
login.setVisibility(View.INVISIBLE);
password.setVisibility(View.INVISIBLE);
myIntent = new Intent(v.getContext(), GMapsActivity1.class);
} else {
}
startActivity(myIntent);
}
});
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}
请有人帮我这样做
更新 这是我的第二个活动代码请检查是否需要更改
public class GMapsActivity1 extends MapActivity {
private MapView mapView;
EditText password;
Button login;
JSONArray jArray;
String result = null;
InputStream is = null;
StringBuilder sb=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.map_view);
mapView.setBuiltInZoomControls(true);
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://sml.com.pk/a/map.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection"+e.toString());
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line="0";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
//paring data
double LAT;
double LANG;
String INFO;
try{
jArray = new JSONArray(result);
JSONObject json_data=null;
for(int i=0;i<jArray.length();i++){
json_data = jArray.getJSONObject(i);
LAT=json_data.getDouble("lat");
LANG=json_data.getDouble("lang");
INFO=json_data.getString("info");
//Overlay code
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.icon);
CustomItemizedOverlay itemizedOverlay = new CustomItemizedOverlay(drawable, this);
//GeoPoint point = new GeoPoint(latitudeE6, longitudeE6);
GeoPoint point = new GeoPoint((int)(LAT * 1e6),(int)(LANG * 1e6));
OverlayItem overlayitem = new OverlayItem(point, "Shakarganj", INFO);
itemizedOverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay);
MapController mapController = mapView.getController();
mapController.animateTo(point);
mapController.setZoom(6);
//Overlay code
}
}
catch(JSONException e1){
Toast.makeText(getBaseContext(), "No Vehicles Found" ,Toast.LENGTH_LONG).show();
} catch (ParseException e1) {
e1.printStackTrace();
}
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
}
这是My Manifest文件代码
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.javacodegeeks.android.googlemaps"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="10"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".GMapsActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="GMapsActivity1"
android:launchMode="singleTop">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</activity>
<uses-library android:name="com.google.android.maps" />
</application>
</manifest>
UPDATE1
package com.javacodegeeks.android.googlemaps;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.widget.Toast;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;
public class CustomItemizedOverlay extends ItemizedOverlay<OverlayItem> {
private ArrayList<OverlayItem> mapOverlays = new ArrayList<OverlayItem>();
private Context context;
public CustomItemizedOverlay(Drawable defaultMarker) {
super(boundCenterBottom(defaultMarker));
}
public CustomItemizedOverlay(Drawable defaultMarker, Context context) {
this(defaultMarker);
this.context = context;
}
@Override
protected OverlayItem createItem(int i) {
return mapOverlays.get(i);
}
@Override
public int size() {
return mapOverlays.size();
}
@Override
protected boolean onTap(int index) {
OverlayItem item = mapOverlays.get(index);
//AlertDialog.Builder dialog = new AlertDialog.Builder(context);
//dialog.setTitle(item.getTitle());
//dialog.setMessage(item.getSnippet());
//dialog.show();
//Toast.makeText(context, item.getSnippet(), 20);
Toast.makeText(context, item.getSnippet(), Toast.LENGTH_LONG).show();
return true;
}
public void addOverlay(OverlayItem overlay) {
mapOverlays.add(overlay);
this.populate();
}
}
答案 0 :(得分：1)
请尝试以下代码：
public class GMapsActivity extends MapActivity {
EditText password;
Button login;
MapView mapView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
password=(EditText)findViewById(R.id.pass);
login=(Button)findViewById(R.id.login);
mapView=(MapView)findViewById(R.id.map_view);
login.setOnClickListener(new View.OnClickListener(){
public void onClick(View v)
{
Intent myIntent = null;
if(password.getText().toString().equals("admin")) {
System.out.println("Entering");
mapView.setVisibility(View.VISIBLE);
login.setVisibility(View.INVISIBLE);
password.setVisibility(View.INVISIBLE);
myIntent = new Intent(GMapsActivity.this, GMapsActivity1.class);
startActivity(myIntent);
}
}
});
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}
<强>更新
为什么你用这个：
<activity android:name="GMapsActivity1"
android:launchMode="singleTop">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</activity>
像这样使用：
<activity
android:name=".GMapsActivity1"
android:launchMode="singleTop" >
</activity>
答案 1 :(得分：0)
确保您正在创建myIntent正确并且它不为空（在 else 中您没有做任何事情......）
同时更改以下内容的创建：
myIntent = new Intent(GMapsActivity.this, GMapsActivity1.class);
答案 2 :(得分：0)
if(password.getText().toString().equals("admin")) {
System.out.println("Entering");
mapView.setVisibility(View.VISIBLE);
login.setVisibility(View.INVISIBLE);
password.setVisibility(View.INVISIBLE);
myIntent = new Intent(v.getContext(), GMapsActivity1.class);
} else {
}
startActivity(myIntent);
上面的代码说myIntent仅在密码为admin时才初始化，否则为..但是它的使用甚至没有初始化以启动活动..
答案 3 :(得分：0)
试试这段代码。
Intent myIntent = null;
if(password.getText().toString().equals("admin")) {
System.out.println("Entering");
mapView.setVisibility(View.VISIBLE);
login.setVisibility(View.INVISIBLE);
password.setVisibility(View.INVISIBLE);
myIntent = new Intent(GMapsActivity.this, GMapsActivity1.class);
startActivity(myIntent);
} else {
Toast.makeText(context, "password is invalid", Toast.LENGTH_SHORT).show();
}
答案 4 :(得分：0)
而不是写
Intent myIntent = null;
myIntent = new Intent(v.getContext(), GMapsActivity1.class);
添加
Intent myIntent = new Intent(getApplicationContext(), GMapsActivity1.class);
或
Intent myIntent = new Intent(GMapsActivity.this, GMapsActivity1.class);
答案 5 :(得分：0)
你需要在清单文件中添加此活动，否则它将无法启动并且会崩溃，我认为你没有这样做......
<activity android:name="GMapsActivity1"
android:launchMode="singleTop"></activity>
答案 6 :(得分：0)
首先放入startActivity（myIntent）;在if条件下并确保setContentView（...）;在GMapsActivity1活动中正确定义的活动与清单文件中添加的GMapsActivity1一样好。 还有一件事可能是可能的，即你可以使用R.id ....而不是在此活动的layout.xml中定义。
答案 7 :(得分：0)
这是一篇旧帖子，但我找到了一个尚未发布的解决方案。
使用调用活动时，必须使用startActivityForResult进行可能导致您尝试获取调用活动的活动的意图。
示例：
Intent intent = new Intent（MainActivity.this，NextActivity.class）; startActivityForResult（intent，123）;