使用RecyclerView是Item里的ImageView无法响应Click事件，但是Touch可以

Question

这个是项布局<?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:orientation="vertical">    <ImageView
        android:id="@+id/imgMachine"
        android:layout_width="@dimen/dp_72"
        android:layout_height="@dimen/dp_72"
        android:layout_marginLeft="@dimen/dp_8"
        android:layout_marginRight="@dimen/dp_8"
        android:clickable="true"
        android:longClickable="true"
        android:src="@drawable/machine" />    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal">        <TextView
            android:id="@+id/txtMachineTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="一号清洗站#1"
            android:textSize="@dimen/sp_8" />        <TextView
            android:id="@+id/txtMachineMac"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:visibility="gone" />
    </LinearLayout>
</LinearLayout>
这个是自定义Adapter里面的ViewHolderclass MachineGridViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {        /**
         * The Machine.
         */
        ImageView machine;
        /**
         * The Title.
         */
        TextView title;        /**
         * The Mac.
         */
        TextView mac;        /**
         * Instantiates a new Machine grid view holder.
         *
         * @param itemView the item view
         */
        public MachineGridViewHolder(View itemView) {
            super(itemView);            machine = (ImageView) itemView.findViewById(R.id.imgMachine);
            title = (TextView) itemView.findViewById(R.id.txtMachineTitle);
            mac = (TextView) itemView.findViewById(R.id.txtMachineMac);            machine.setOnClickListener(this);
        }        @Override
        public void onClick(View v) {
            if (listener != null) {
                listener.onItemClick(mac.getText().toString());
            }
        }
    }
很奇怪title和mac控件都能正常响应Click事件，但是machine这个ImageView死活没效果。

Answer 1

明明可以，可能是你id为txtMachineMac的TextView的getText为空，下面是我的代码，运行没问题
public class MainActivity extends AppCompatActivity {    private RecyclerView mRecyclerView;
    MyAdapter myAdapter;    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);        myAdapter = new MyAdapter(this);
        myAdapter.setItemClick(new ItemClick() {
            @Override
            public void onItemClick(String s) {
                Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();
            }
        });
        mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mRecyclerView.setAdapter(myAdapter);
    }}
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MachineGridViewHolder> {    ItemClick listener;
    Context context;    MyAdapter (Context context ) {
        this.context = context;
    }    @Override
    public MachineGridViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
    {
        MachineGridViewHolder holder = new MachineGridViewHolder(LayoutInflater.from(
                context).inflate(R.layout.item, parent,
                false));
        return holder;
    }    @Override
    public void onBindViewHolder(MachineGridViewHolder holder, int position)
    {    }    @Override
    public int getItemCount()
    {
        return 20;
    }    public void setItemClick(ItemClick itemClick) {
        this.listener = itemClick;
    }    class MachineGridViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {        /**
         * The Machine.
         */
        ImageView machine;
        /**
         * The Title.
         */
        TextView title;        /**
         * The Mac.
         */
        TextView mac;        /**
         * Instantiates a new Machine grid view holder.
         *
         * @param itemView the item view
         */
        public MachineGridViewHolder(View itemView) {
            super(itemView);            machine = (ImageView) itemView.findViewById(R.id.imgMachine);
            title = (TextView) itemView.findViewById(R.id.txtMachineTitle);
            mac = (TextView) itemView.findViewById(R.id.txtMachineMac);            machine.setOnClickListener(this);/*            machine.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    listener.onItemClick(mac.getText().toString());
                }
            });*/        }        @Override
        public void onClick(View v) {
            if (listener != null) {
                listener.onItemClick(mac.getText().toString());
            }
        }
    }
}
<?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:orientation="vertical">    <ImageView
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:id="@+id/imgMachine"
        android:clickable="true"
        android:longClickable="true"
        android:src="@mipmap/ic_launcher" />    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal">        <TextView
            android:id="@+id/txtMachineTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="一号清洗站#1"/>        <TextView
            android:id="@+id/txtMachineMac"
            android:text="mac"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:visibility="gone" />
    </LinearLayout>
</LinearLayout>

Answer 2

博主，估计是你在调用myAdapter.setItemClick()顺序上有问题吧，它应该如楼上所写在mRecyclerView.setAdapter()前面。

Answer 3

ImageView调用bringToFront即可