我似乎不知道如何去做。一旦我点击浮动按钮，我的应用程序崩溃，我没有在我的清单中声明SecondActivity.java
这是activity_maps.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity"
tools:layout="@android:layout/simple_spinner_dropdown_item" />
<ImageButton
android:layout_width="65dp"
android:layout_height="65dp"
android:id="@+id/imagebutton"
android:src="@drawable/ic_pin_drop_black_24dp"
/>
</RelativeLayout>
MapsActivity.java
import android.app.Activity;
import android.content.Intent;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ZoomButton;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import android.app.AppOpsManager;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
ImageButton floatButton;
@Override
protected void onCreate(Bundle savedinstancestate) {
super.onCreate(savedinstancestate);
setContentView(R.layout.activity_maps);
floatButton = (ImageButton) findViewById(R.id.imagebutton);
floatButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(MapsActivity.this,SecondActivity.class);
startActivity(i);
}
});
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng (6.5084, 3.3842), 14));
}
}
我创建了第二个活动 activty_second.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity"
tools:layout="@android:layout/simple_spinner_dropdown_item" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Lagos Mainland"
android:padding="8dp"
android:background="#53fed0"
android:id="@+id/buttonMaps"
android:layout_marginLeft="90dp"
android:layout_marginStart="90dp"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hospital"
android:id="@+id/buttonMaps2"
android:layout_marginTop="35dp"
android:layout_below="@+id/buttonMaps"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:clickable="true"
android:background="@color/colorAccent" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Bus Stops"
android:id="@+id/buttonMaps3"
android:clickable="true"
android:layout_marginTop="35dp"
android:background="@color/colorAccent"
android:layout_below="@+id/buttonMaps2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Taxi"
android:id="@+id/buttonMaps4"
android:layout_below="@+id/buttonMaps3"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="35dp"
android:clickable="true"
android:background="@color/colorAccent" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Gas Station"
android:id="@+id/buttonMaps5"
android:layout_marginTop="35dp"
android:clickable="true"
android:background="@color/colorAccent"
android:layout_below="@+id/buttonMaps4"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Park"
android:id="@+id/buttonMaps6"
android:layout_marginTop="35dp"
android:clickable="true"
android:background="@color/colorAccent"
android:layout_below="@+id/buttonMaps5"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</LinearLayout>
SecondActivity.java
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class SecondActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
@Override
protected void onCreate(Bundle savedinstancestate) {
super.onCreate(savedinstancestate);
setContentView(R.layout.activty_second);
final Button button1 = (Button) findViewById(R.id.buttonMaps);
final Button button2 = (Button) findViewById(R.id.buttonMaps2);
final Button button3 = (Button) findViewById(R.id.buttonMaps3);
final Button button4 = (Button) findViewById(R.id.buttonMaps4);
final Button button5 = (Button) findViewById(R.id.buttonMaps5);
final Button button6 = (Button) findViewById(R.id.buttonMaps6);
ImageButton floatButton;
floatButton = (ImageButton) findViewById(R.id.imagebutton);
floatButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
button1.isShown();
button2.isShown();
button3.isShown();
button4.isShown();
button5.isShown();
button6.isShown();
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mMap.clear();
if (button1.isShown()) {
mMap.addMarker(new MarkerOptions().position(new LatLng()).title("").snippet("My Location").icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher)));
}
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mMap.clear();
if (button2.isShown()) {
mMap.addMarker(new MarkerOptions().position(new LatLng()).title("").icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher_hospital)));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(6.5084, 3.3842), 14));
}
}
});
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mMap.clear();
if (button3.isShown()) {
mMap.addMarker(new MarkerOptions().position(new LatLng()).title("").icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher_busstop)));
}
}
});
button4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mMap.clear();
if (button4.isShown()) {
mMap.addMarker(new MarkerOptions().position(new LatLng()).title("").icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher_taxi)));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(6.5084, 3.3842), 14));
}
}
});
button5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mMap.clear();
if (button5.isShown()) {
mMap.addMarker(new MarkerOptions().position(new LatLng()).title("").icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher_gas)));
}
}
});
button6.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mMap.clear();
if (button6.isShown()) {
mMap.addMarker(new MarkerOptions().position(new LatLng()).title("").icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher_park)));
}
}
});
}
});
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
我的Android Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.multidex.myapplication">
android:theme="@android:style/AppTheme"
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="Android Map"
android:supportsRtl="true"
android:theme="@style/AppTheme">
android:name="android.support.multidex.MultiDexApplication">
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="" />
<activity
android:name=".MapsActivity"
android:label="Map">
<activity
android:name=".SecondActivity"/>
</activity>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</application>
</manifest>
请帮忙
这是CrashLog
FATAL EXCEPTION: main
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.user.naviapp/com.example.user.naviapp.SecondActivity}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1512)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1388)
at android.app.Activity.startActivityForResult(Activity.java:3190)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:871)
at android.app.Activity.startActivity(Activity.java:3297)
at com.example.user.naviapp.MapsActivity$1.onClick(MapsActivity.java:49)
at android.view.View.performClick(View.java:3558)
at android.view.View$PerformClick.run(View.java:14157)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4514)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
您以错误的方式在清单中宣布您的活动，请执行以下操作：
<activity
android:name=".MapsActivity"
android:label="Map">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SecondActivity"/>