蓝牙开发在ViewPager中嵌套ListView以显示设备，数据无法显示？

Question

蓝牙开发，之前在activity_main.xml中直接添加listview显示设备list没问题，但使用viewpager嵌套listview显示设备就显示不出设备了，求大神解答

MainActivity中的问题代码:

View view1 = this.getLayoutInflater().inflate(R.layout.layout2,null);
mListView = (ListView) view1.findViewById(R.id.ListBonded);
mListView = (ListView)findViewById(R.id.ListBonded);
mAdapter = new DeviceAdapter(mDeviceList,this);
mListView.setAdapter(mAdapter);

MainActivity中显示已绑定设备函数：

//查看已绑定设备
    public void ShowBondDevice(View view){
        showToast("刷新界面");
        mBondedDeviceList = mController.getBondedDeviceList();
        mAdapter.refresh(mBondedDeviceList);
        mListView.setOnItemClickListener(bondedDeviceClick);
    }

BluetoothController.java:

package com.example.ble5;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;

import java.util.ArrayList;
import java.util.List;

public class BluetoothController {
    private BluetoothAdapter mAdapter;
    public BluetoothController(){
        mAdapter = BluetoothAdapter.getDefaultAdapter();
    }
    //判断当前设备是否支持蓝牙
    public boolean isSupportBlueTooth(){
        if (mAdapter != null){
            return true;
        }else {
            return false;
        }
    }
    public BluetoothAdapter getAdapter(){
        return mAdapter;
    }
    //判断当前蓝牙状态
    public boolean getBluetoothStatus(){
        assert (mAdapter != null);
        return mAdapter.isEnabled();
    }
    //打开蓝牙
    public void turnOnBluetooth(Activity activity, int requestCode){
        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        activity.startActivityForResult(intent,requestCode);
    }
    //关闭蓝牙
    public void turnOffBluetooth(){
        mAdapter.disable();
    }
    //搜索设备
    public void findDevice(){
        assert (mAdapter != null);
        mAdapter.startDiscovery();
    }
    //查看绑定设备
    public List<BluetoothDevice> getBondedDeviceList(){
        return new ArrayList<>(mAdapter.getBondedDevices());
    }
    //打开可见
    public void enableVisibly(Activity activity,int requestCode){
        Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
        discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,300);
        activity.startActivity(discoverableIntent);
    }
}

DeviceAdapter.java:

package com.example.ble5;

import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

public class DeviceAdapter extends BaseAdapter {
    private List<BluetoothDevice> mData;
    private Context mContext;

    public DeviceAdapter(List<BluetoothDevice> data, Context context){
        mData = data;
        mContext = context.getApplicationContext();
    }
    @Override
    public int getCount() {
        return mData.size();
    }

    @Override
    public Object getItem(int i) {
        return mData.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        View itemView = view;
        if (itemView == null){
            itemView = LayoutInflater.from(mContext).inflate(android.R.layout.simple_list_item_2,viewGroup,false);
        }
        TextView line1 = (TextView)itemView.findViewById(android.R.id.text1);
        TextView line2 = (TextView)itemView.findViewById(android.R.id.text2);
        //获取对应蓝牙设备
        BluetoothDevice device = (BluetoothDevice) getItem(i);
        //显示名称
        line1.setText(device.getName());
        //显示地址
        line2.setText(device.getAddress());
        return itemView;
    }

    public void refresh(List<BluetoothDevice> data){
        mData = data;
        notifyDataSetChanged();
    }
}

Answer 1

你改成 ViewPager嵌套Fragment，Fragment实现列表