我正在对我的应用程序的 XML 布局端进行一些更改。我试图将一个 ImageView 放在前面，但当我让应用程序崩溃时，我似乎可以说出原因。
工作 XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/place_distance"
android:layout_width="wrap_content"
android:layout_height="14dip"
android:layout_alignParentRight="true"
android:layout_gravity="right"
android:layout_margin="5dip"
android:gravity="right"
android:text="28-12-1920 22:22"
android:textColor="@color/white"
android:textSize="12sp" />
<ImageView
android:id="@+id/place_img"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="5dp"
android:scaleType="centerCrop"
android:src="@drawable/icon_4860_1" />
<LinearLayout
android:id="@+id/wrapper"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/place_img"
android:layout_alignRight="@+id/place_distance"
android:layout_below="@+id/place_distance"
android:layout_marginTop="5dp"
android:background="@drawable/chatbox" >
<TextView
android:id="@+id/comment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="43dp"
android:padding="9dp"
android:paddingLeft="10dip"
android:text="Hello bubbles!"
android:textColor="@android:color/white"
android:textColorLink="@android:color/holo_blue_dark"
android:textIsSelectable="true" />
</LinearLayout>
<TextView
android:id="@+id/place_name"
android:textIsSelectable="true"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/place_distance"
android:layout_toLeftOf="@+id/place_distance"
android:layout_toRightOf="@+id/place_img"
android:text="Tweeked"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/gray"
android:textSize="11dp"
android:textStyle="bold" />
<ImageView
android:id="@+id/pe_profile_pic"
android:layout_width="10dp"
android:layout_height="10dp"
android:layout_margin="2dp"
android:layout_alignBottom="@+id/place_img"
android:layout_alignRight="@+id/place_img"
android:src="@drawable/offline" />
崩溃的 XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/place_distance"
android:layout_width="wrap_content"
android:layout_height="14dip"
android:layout_alignParentRight="true"
android:layout_gravity="right"
android:layout_margin="5dip"
android:gravity="right"
android:text="28-12-1920 22:22"
android:textColor="@color/white"
android:textSize="12sp" />
<LinearLayout
android:id="@+id/wrapper"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/place_img"
android:layout_alignRight="@+id/place_distance"
android:layout_below="@+id/place_distance"
android:layout_marginTop="5dp"
android:background="@drawable/chatbox" >
<TextView
android:id="@+id/comment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="43dp"
android:padding="9dp"
android:paddingLeft="10dip"
android:text="Hello bubbles!"
android:textColor="@android:color/white"
android:textColorLink="@android:color/holo_blue_dark"
android:textIsSelectable="true" />
<!-- android:autoLink="web|all" -->
</LinearLayout>
<ImageView
android:id="@+id/place_img"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="5dp"
android:scaleType="centerCrop"
android:src="@drawable/icon_4860_1" />
<TextView
android:id="@+id/place_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/place_distance"
android:layout_toLeftOf="@+id/place_distance"
android:text="Tweeked"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/gray"
android:textIsSelectable="true"
android:textSize="11dp"
android:textStyle="bold" />
<ImageView
android:id="@+id/pe_profile_pic"
android:layout_width="10dp"
android:layout_height="10dp"
android:layout_alignBottom="@+id/place_img"
android:layout_alignRight="@+id/place_img"
android:layout_margin="2dp"
android:src="@drawable/offline" />
我只是想把@place_img 带到@wrapper 的前面。
com.peekatucorp.peekatu.DiscussArrayAdapter.getView 处的 java.lang.NullPointerException（DiscussArrayAdapter.java:172）
讨论ArrayAdapter.java：
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
if (row == null) {
LayoutInflater inflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if(type==1 || type==3)
row = inflater.inflate(R.layout.listitem_discuss, parent, false);
else if(type==4 || type==5)
row = inflater.inflate(R.layout.listitem_users, parent, false);
else
row = inflater.inflate(R.layout.listitem_messages, parent, false);
}
//
final OneComment coment = getItem(position);
userComment = (TextView) row.findViewById(R.id.comment);
userImage = (ImageView) row.findViewById(R.id.place_img);
userName = (TextView) row.findViewById(R.id.place_name);
userOnlineImage = (ImageView) row.findViewById(R.id.pe_profile_pic);
commentDate = (TextView) row.findViewById(R.id.place_distance);
userComment.setText(coment.comment);
ImageLoader imageLoader = ImageLoader.getInstance();
// imageLoader = ImageLoader.getInstance();
// imageLoader.init(ImageLoaderConfiguration.createDefault(convertView.getContext()));
imageLoader.displayImage(coment.image, userImage);
userImage.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// it was the 1st button
final TabInfo tab = navact.getCurrentTabInfo();
final ProfileFragment fragment = new ProfileFragment().setUser(coment.userid).setNAV(navact);
// fragment.setText(characters[position]);
// second, you push the fragment. It becomes visible and the up button is
// shown
navact.pushFragment(tab, fragment);
/*
Intent i = new Intent(context, ProfileActivity.class);
i.putExtra("userID", coment.userid);
// Create the view using FirstGroup's LocalActivityManager
View view = ChatTabGroup.group.getLocalActivityManager()
.startActivity("show profile", i
.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
.getDecorView();
// Again, replace the view
ChatTabGroup.group.replaceView(view);*/
}
});
if(coment.online.equalsIgnoreCase("1"))
userOnlineImage.setImageResource(R.drawable.online);
else
userOnlineImage.setImageResource(R.drawable.offline);
if(coment.gender.equalsIgnoreCase("M"))
userName.setTextColor(Color.parseColor("#878ff4"));
else if(coment.gender.equalsIgnoreCase("F"))
userName.setTextColor(Color.parseColor("#f487d6"));
else
userName.setTextColor(Color.parseColor("#969696"));
userName.setText(coment.username);
commentDate.setText(coment.time);
if(type==4){
commentDate = (TextView) row.findViewById(R.id.textView1);
SharedPreferences preferences = getContext().getSharedPreferences("MyPreferences", getContext().MODE_PRIVATE);
double distance = distFrom(Double.parseDouble(getItem(position).time.split(",")[0]),Double.parseDouble(getItem(position).time.split(",")[1]),
Double.parseDouble(preferences.getString("user_lat", "0.0")),Double.parseDouble(preferences.getString("user_lng", "0.0"))
);
commentDate.setText(""+String.format("%.2f", (distance*0.62))+"miles");
}
if(type==1 || type==3){
wrapper = (LinearLayout) row.findViewById(R.id.wrapper);
wrapper.setGravity(coment.left ? Gravity.LEFT : Gravity.RIGHT);
}else{
}
//
return row;
}
谢谢你。