2天是我正在尝试解决此问题的当前时间，但仍然没有解决方案，基本上我创建了一个简单的导航抽屉，它有一个工具栏，浮动操作按钮和一个导航（android studio的默认活动）。 / p>
之后我尝试改变它，我在样式上编辑了它的图标：
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimaryDark">@color/nephritis</item>
<item name="colorControlActivated">@color/emerald</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="android:actionOverflowButtonStyle">@style/MyActionButtonOverflow</item>
<item name="android:spinnerStyle">@style/mySpinnerItemStyle</item>
</style>
<style name="MyActionButtonOverflow" parent="android:style/Widget.Holo.Light.ActionButton.Overflow">
<item name="android:src">@drawable/ic_user</item>
<item name="android:tint">@color/white</item>
</style>
我认为我做了一些破坏我的工具栏的更改，所以基本上我将工具栏和其他一些东西包括在我的主要活动中：
我的主要活动
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_plant_feed"
app:layout_widthPercent="100%"
app:layout_heightPercent="8%"
app:layout_marginTopPercent="0%"
app:layout_marginLeftPercent="0%" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_plant_feed"
app:menu="@menu/activity_plant_feed_drawer"
android:background="@color/white"/>
</android.support.v4.widget.DrawerLayout>
然后我有了包含的布局：
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.afcosta.inesctec.pt.android.PlantFeed">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@color/emerald"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycleView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:backgroundTint="#f1c40f"
android:src="@android:drawable/ic_menu_camera" />
<include layout="@layout/content_plant_feed" />
</android.support.design.widget.CoordinatorLayout>
我的活动课程：
public class PlantFeed extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener,PlantFeedAdapter.OnItemClickListener {
//initialize fields
String token;
ArrayList<PlantPhotoUser> photos = new ArrayList<>();
VolleyService mVolleyService;
IResult mResultCallback = null;
final String GETREQUEST = "GETCALL";
String connectionTxt;
String URL;
String date;
String lat;
String lon;
String alt;
PlantFeedAdapter plantFeedAdapter;
RecyclerView recyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_plant_feed);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
connectionString connection = ((connectionString) getApplicationContext());
connectionTxt = connection.getGlobalVarValue();
URL = connectionTxt + "/fotos";
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(PlantFeed.this,CameraCapture.class);
startActivity(i);
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
recyclerView = (RecyclerView)findViewById(R.id.recycleView2);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
plantFeedAdapter = new PlantFeedAdapter(getApplicationContext(), photos,PlantFeed.this);
recyclerView.setAdapter(plantFeedAdapter);
token = checkForToken();
initVolleyCallback();
mVolleyService = new VolleyService(mResultCallback,this);
mVolleyService.getDataVolley(GETREQUEST,URL,token);
}
void initVolleyCallback(){
mResultCallback = new IResult() {
@Override
public void notifySuccess(String requestType,JSONObject response) {
Log.d("HELLL","hi1");
}
@Override
public void notifySuccess(String requestType, JSONArray response) {
PlantPhotoUser plantPhotoUser;
Log.d("HELLLL","hi");
for (int i=0; i < response.length(); i++) {
try {
JSONObject object = response.getJSONObject(i);
Log.d("objeto",object.toString());
int userId = object.getInt("userId");
Log.d("objeto",String.valueOf(userId));
String username = object.getJSONObject("user").getString("username");
Log.d("objeto",String.valueOf(username));
int plantId = object.getInt("plantId");
Log.d("objeto",String.valueOf(plantId));
String specie = object.getJSONObject("plant").getString("specie");
Log.d("objeto",String.valueOf(specie));
String path = object.getString("image");
Log.d("objeto",String.valueOf(path));
int fotoId = object.getInt("id");
if(object.getString("date") != null){
date = object.getString("date");
}
if(object.getString("lat") != null){
lat = object.getString("lat");
}
if(object.getString("lon") != null){
lon = object.getString("lon");
}
if(object.getString("altitude") != null){
alt = object.getString("altitude");
}
plantPhotoUser = new PlantPhotoUser(fotoId,plantId,userId,path,specie,date,lat,lon,alt,username);
photos.add(plantPhotoUser);
} catch (JSONException e) {
e.printStackTrace();
}
}
plantFeedAdapter.notifyDataSetChanged();
}
@Override
public void notifyError(String requestType,VolleyError error) {
Log.d("FAIL",error.toString());
}
};
}
public String checkForToken() {
SharedPreferences sharedPref = getSharedPreferences("user", MODE_PRIVATE);
String tokenKey = getResources().getString(R.string.token);
String token = sharedPref.getString(getString(R.string.token), tokenKey); // take the token
return token;
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.plant_feed, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
Intent i = new Intent(PlantFeed.this,CameraCapture.class);
startActivity(i);
} else if (id == R.id.nav_gallery) {
Intent i = new Intent(PlantFeed.this,PlantFeed.class);
startActivity(i);
} else if (id == R.id.nav_slideshow) {
Intent i = new Intent(PlantFeed.this,FamilyLibrary.class);
startActivity(i);
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
@Override
public void onRowClick(int position, String name, int id, View view) {
}
@Override
public void onTitleClicked(int position, int id, View clickedview) {
Intent i = new Intent(this,PhotosForPlant.class);
i.putExtra("plantId",String.valueOf(id));
startActivity(i);
}
@Override
public void onImageClicked(int position, int id, View clickedview) {
Intent i = new Intent(this,PhotosForPlant.class);
i.putExtra("plantId",String.valueOf(id));
startActivity(i);
}
@Override
public void onReportClicked(int position, int id, String name, View clickedview) {
Log.d("HELLLO","HELLOO");
showDialogReport(id,name);
}
@Override
public void onUserIconClicked(int position, int id, View clickedview) {
Intent i = new Intent(this,UserProfile.class);
i.putExtra("userId",id);
startActivity(i);
}
@Override
public void onUsernameClicked(int position, int id, View clickedview) {
Intent i = new Intent(this,UserProfile.class);
i.putExtra("userId",id);
startActivity(i);
}
@Override
public void onAvaliationClicked(int position, int id, String name, View clickedview) {
}
private void showDialogReport(int id, String name) {
Log.d("HELLLO","HELLOO");
AlertDialog.Builder builder = new AlertDialog.Builder(PlantFeed.this);
builder.setTitle(name);
builder.setMessage("Tem a certeza que pretende reportar a fotografia?");
builder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//TODO reportar base de dados
}
});
builder.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.dismiss();
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
}
最后是菜单布局：
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="@string/action_settings"
app:showAsAction="never"/>
</menu>
我想显示菜单，但它从未显示，它之前崩溃了，我得到了这个堆栈跟踪：
FATAL EXCEPTION: main
Process: com.example.afcosta.inesctec.pt.android, PID: 12537
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at android.support.v7.view.menu.ListMenuItemView.setTitle(ListMenuItemView.java:127)
at android.support.v7.view.menu.ListMenuItemView.initialize(ListMenuItemView.java:113)
at android.support.v7.view.menu.MenuAdapter.getView(MenuAdapter.java:100)
at android.support.v7.view.menu.MenuPopup.measureIndividualMenuWidth(MenuPopup.java:160)
at android.support.v7.view.menu.StandardMenuPopup.tryShow(StandardMenuPopup.java:153)
at android.support.v7.view.menu.StandardMenuPopup.show(StandardMenuPopup.java:187)
at android.support.v7.view.menu.MenuPopupHelper.showPopup(MenuPopupHelper.java:290)
at android.support.v7.view.menu.MenuPopupHelper.tryShow(MenuPopupHelper.java:175)
at android.support.v7.widget.ActionMenuPresenter$OpenOverflowRunnable.run(ActionMenuPresenter.java:803)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
我在堆栈跟踪上没有任何关于这些名称的活动，它们存在是因为导航创建了它们internaly所以我不知道如何避免这个错误，任何帮助？
适配器代码：
package com.example.afcosta.inesctec.pt.android.Adapters;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.afcosta.inesctec.pt.android.R;
import com.example.afcosta.inesctec.pt.android.modelView.PlantPhotoUser;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
/**
* Created by FilipeCosta on 29/05/2017.
*/
public class PlantFeedAdapter extends RecyclerView.Adapter<PlantFeedAdapter.ViewHolder> {
private OnItemClickListener listener;
public interface OnItemClickListener {
void onRowClick(int position, String name, int id, View view);
void onTitleClicked(int position, int id, View clickedview);
void onImageClicked(int position,int id, View clickedview);
void onReportClicked(int position, int id,String name, View clickedview);
void onUserIconClicked(int position, int id, View clickedview);
void onUsernameClicked(int position, int id, View clickedview);
void onAvaliationClicked(int position, int id,String name, View clickedview);
}
private ArrayList<PlantPhotoUser> photos;
private Context context;
public PlantFeedAdapter(Context context, ArrayList<PlantPhotoUser> photos, OnItemClickListener listener) {
this.photos = photos;
this.context = context;
this.listener = listener;
}
@Override
public PlantFeedAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.plant_feed_row, viewGroup, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(final PlantFeedAdapter.ViewHolder viewHolder, final int i) {
viewHolder.name.setText(photos.get(i).getSpecie());
viewHolder.username.setText(photos.get(i).getUsernName());
viewHolder.data.setText(photos.get(i).getDate().split("T")[0]);
Log.d("data123",(photos.get(i).getDate().toString()));
String urlFoto = "http://fe1b7efd.ngrok.io/" + photos.get(i).getPath();
if(urlFoto.toLowerCase().contains("public/")){
urlFoto = urlFoto.replace("public/","");
}
viewHolder.userIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (listener != null) {
listener.onUserIconClicked(viewHolder.getAdapterPosition(), photos.get(i).getUserId(), view);
}
}
});
viewHolder.username.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (listener != null) {
listener.onUsernameClicked(viewHolder.getAdapterPosition(),photos.get(i).getUserId(), view);
}
}
});
viewHolder.plantImg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (listener != null) {
listener.onImageClicked(viewHolder.getAdapterPosition(), photos.get(i).getIdPlant(), view);
}
}
});
viewHolder.name.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(listener != null){
listener.onTitleClicked(viewHolder.getAdapterPosition(),photos.get(i).getIdPlant(),v);
}
}
});
viewHolder.reportImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(listener != null){
listener.onReportClicked(viewHolder.getAdapterPosition(),photos.get(i).getIdPlant(),photos.get(i).getSpecie(),v);
}
}
});
/*viewHolder.avaliationFoto.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(listener != null){
listener.onAvaliationClicked(viewHolder.getAdapterPosition(),photos.get(i).getIdPlant(),photos.get(i).getSpecie(),v);
}
}
});*/
Picasso.with(context)
.load(urlFoto)
.resize(300, 300)
.into(viewHolder.plantImg);
}
@Override
public int getItemCount() {
return photos.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
private TextView name;
private ImageView userIcon;
private TextView avaliationFoto;
private ImageView plantImg;
private ImageView foto;
private TextView username;
private ImageView reportImage;
private TextView data;
public ViewHolder(View view) {
super(view);
data = (TextView)view.findViewById(R.id.data);
name = (TextView) view.findViewById(R.id.plantName);
userIcon = (ImageView)view.findViewById(R.id.userIcon);
plantImg = (ImageView)view.findViewById(R.id.plantPhoto);;
username = (TextView)view.findViewById(R.id.password);
reportImage = (ImageView)view.findViewById(R.id.cameraForbiden);
}
}
}