Android ListView not showing on real device but on emulator does

问题

I'm having a weird problem regarding the simple ListView. On my emulator everything is allright and the data is loaded correctly from JSON API, the data also loads on my device. The problem is that on my emulator, the listview is populated but on my real device, not, even if there is data from JSON, why ?

    private void addItemsToListView(JSONObject message) {
    try {
        JSONArray jsonArray = message.getJSONArray("android");
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject c = jsonArray.getJSONObject(i);
            String imagePath = c.getString("path");
            try {
                myImages.add(new ImagesModel(i, imagePath, R.drawable.mtr));
            } catch(Exception e) {
                e.printStackTrace();
            }
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

回答1:

Got the problem, I've changed the layout from RelativeLayout to LinearLayout and it is all working fine.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@color/view_background"
android:orientation="vertical"
android:padding="10dp"
android:weightSum="1">

<ProgressBar
    android:id="@+id/progressBar1"
    style="@style/Base.Widget.AppCompat.ProgressBar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:progress="@integer/abc_config_activityShortDur"
    android:layout_centerInParent="true"
    android:maxHeight="100dp"
    android:maxWidth="100dp"
    android:minHeight="200dp"
    android:minWidth="200dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="@string/btnUploadedActivity"
    android:id="@+id/imagesListViewTitle"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />

<ListView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/imagesListView"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_alignLeft="@+id/imagesListViewTitle"
    android:layout_below="@+id/imagesListViewTitle"
    android:smoothScrollbar="true" />
</LinearLayout>

来源：https://stackoverflow.com/questions/29938466/android-listview-not-showing-on-real-device-but-on-emulator-does

标签

android

json

listview

emulation

device