展開式ListView上的子級意圖

Question

您好，我想在可擴展列表視圖中使用一個意圖。但是每次我單擊一個孩子時，它只是顯示一個TOAST，而並沒有按照我的意圖進行。任何幫助都受到高度贊賞。

import java.util.ArrayList;

import android.app.ExpandableListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;

public class LessonsMenu extends ExpandableListActivity implements
    OnChildClickListener {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    ExpandableListView expandbleLis = getExpandableListView();
    expandbleLis.setDividerHeight(2);
    expandbleLis.setGroupIndicator(null);
    expandbleLis.setClickable(true);

    setGroupData();
    setChildGroupData();

    NewAdapter mNewAdapter = new NewAdapter(groupItem, childItem);
    mNewAdapter
            .setInflater(
                    (LayoutInflater)         getSystemService(Context.LAYOUT_INFLATER_SERVICE),
                    this);
    getExpandableListView().setAdapter(mNewAdapter);
    expandbleLis.setOnChildClickListener(this);
}

public void setGroupData() {
    groupItem.add("Audio");
    groupItem.add("Camera");
    groupItem.add("External Storage");
    groupItem.add("Input");
    groupItem.add("Security");
    groupItem.add("Sensors");
    groupItem.add("Dalvik");
    groupItem.add("Bluetooth");
    groupItem.add("DRM");
    groupItem.add("Encryption");
    groupItem.add("Graphics");
    groupItem.add("Media");
    groupItem.add("Kernel");
    groupItem.add("Power");
}

ArrayList<String> groupItem = new ArrayList<String>();
ArrayList<Object> childItem = new ArrayList<Object>();

public void setChildGroupData() {
    ArrayList<String> child = new ArrayList<String>();
    child.add("Implementation");
    child.add("Latency Measure");
    child.add("Design");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Camera HAL3");
    child.add("HAL Subsystem");
    child.add("Metadata and Controls");
    child.add("3A Modes and State");
    child.add("Output and Cropping");
    child.add("Errors and Streams");
    child.add("Request Creation");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Device Specific Configuration");
    child.add("Typical Configuration Examples");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Key Layout Files");
    child.add("Key Character Maps Files");
    child.add("Input Device Configurations Files");
    child.add("Migration Guide");
    child.add("Keyboard Devices");
    child.add("Touch Devices");
    child.add("Dumpsys");
    child.add("Getevent");
    child.add("Validate Keymaps");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("dm-verity on boot");
    child.add("Security-Enchanced Linux");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Base Sensors");
    child.add("Composite Sensors");
    child.add("Batching Results");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Bytecode Format");
    child.add(".Dex Format");
    child.add("Instruction Formats");
    child.add("Introducing ART");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Bluetooth");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Digital Rights Management");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Encryption");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Graphics");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Media");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Kernel");
    childItem.add(child);

    child = new ArrayList<String>();
    child.add("Power");
    childItem.add(child);
}
    @Override
    public boolean onChildClick(ExpandableListView parent, View v, int   groupPosition, int childPosition, long id) {
        // Create a switch that switches on the specific child position.
        switch(childPosition) {
        case 0:
            // Go to child #0 specific class.
            Intent child0Intent = new Intent(this, AudioImplementation.class);
            startActivity(child0Intent);
            break;
        case 1:
            // Go to child #1 specific class.
            Intent child1Intent = new Intent(this, AudioLatency.class);
            startActivity(child1Intent);
            break;
        }
        return false;
    }
}

NewAdapter.java

import java.util.ArrayList;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckedTextView;
import android.widget.TextView;
import android.widget.Toast;

@SuppressWarnings("unchecked")
public class NewAdapter extends BaseExpandableListAdapter {

public ArrayList<String> groupItem, tempChild;
public ArrayList<Object> Childtem = new ArrayList<Object>();
public LayoutInflater minflater;
public Activity activity;

public NewAdapter(ArrayList<String> grList, ArrayList<Object> childItem) {
    groupItem = grList;
    this.Childtem = childItem;
}

public void setInflater(LayoutInflater mInflater, Activity act) {
    this.minflater = mInflater;
    activity = act;
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    return null;
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return 0;
}

@Override
public View getChildView(int groupPosition, final int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {
    tempChild = (ArrayList<String>) Childtem.get(groupPosition);
    TextView text = null;
    if (convertView == null) {
        convertView = minflater.inflate(R.layout.childrow, null);
    }
    text = (TextView) convertView.findViewById(R.id.textView1);
    text.setText(tempChild.get(childPosition));
    convertView.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(activity, tempChild.get(childPosition),
                    Toast.LENGTH_SHORT).show();
        }
    });
    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    return ((ArrayList<String>) Childtem.get(groupPosition)).size();
}

@Override
public Object getGroup(int groupPosition) {
    return null;
}

@Override
public int getGroupCount() {
    return groupItem.size();
}

@Override
public void onGroupCollapsed(int groupPosition) {
    super.onGroupCollapsed(groupPosition);
}

@Override
public void onGroupExpanded(int groupPosition) {
    super.onGroupExpanded(groupPosition);
}

@Override
public long getGroupId(int groupPosition) {
    return 0;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
        View convertView, ViewGroup parent) {
    if (convertView == null) {
        convertView = minflater.inflate(R.layout.grouprow, null);
    }
    ((CheckedTextView) convertView).setText(groupItem.get(groupPosition));
    ((CheckedTextView) convertView).setChecked(isExpanded);
    return convertView;
}

@Override
public boolean hasStableIds() {
    return false;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return false;
}

}

childrow.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="40dp"
android:clickable="false"
android:orientation="vertical"
android:background="#FFFFFF"
android:paddingLeft="40dp">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="39dp"
    android:gravity="center_vertical">

    <ImageView
        android:id="@+id/childImage"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_margin="5dp"
        android:background="@drawable/ic_launcher"
        android:contentDescription="@string/hello_world" />

    <TextView
        android:id="@+id/textView1"
        android:clickable="false"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:text="@string/hello_world"
        android:textColor="#000000"
        android:textSize="14sp"
        android:textStyle="bold" />
</LinearLayout>

<View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="@android:color/white" />

</LinearLayout>

Answer 1

您遇到的問題是，項目內部有可單擊的組件。

因此，除非您觸摸項目中不包含帶有點擊監聽器的組件的部分（例如，在TextView之外），否則不會調用子點擊監聽器。

因此，如果您想使用onChildClick回調，則應將TextView設置為clickable false，或者可以使TextView's寬度變小，以便用戶可以在View的項目基礎上在其上按任一。

Answer 2

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return false;
}

變成

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}