OperationActivity.java

package com.clj.blesample.tool.operation;


import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.KeyEvent;
import android.view.View;

import com.clj.blesample.R;
import com.clj.blesample.tool.BluetoothService;

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

public class OperationActivity extends AppCompatActivity {

    private Toolbar toolbar;
    private List<Fragment> fragments = new ArrayList<>();
    private int currentPage = 0;
    private String[] titles = new String[]{"服务列表", "特征列表", "操作控制台"};

    private BluetoothService mBluetoothService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_operation);
        initView();
        bindService();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mBluetoothService != null)
            mBluetoothService.closeConnect();
        unbindService();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (currentPage != 0) {
                currentPage--;
                changePage(currentPage);
                return true;
            } else {
                finish();
                return true;
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    private void initView() {
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("特征列表");
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (currentPage != 0) {
                    currentPage--;
                    changePage(currentPage);
                } else {
                    finish();
                }
            }
        });
    }

    private void initPage() {
        prepareFragment();
        changePage(0);
    }

    public void changePage(int page) {
        currentPage = page;
        toolbar.setTitle(titles[page]);
        updateFragment(page);
        if (currentPage == 1) {
            ((CharacteristicListFragment) fragments.get(1)).showData();
        } else if (currentPage == 2) {
            ((CharacteristicOperationFragment) fragments.get(2)).showData();
        }
    }

    private void prepareFragment() {
        fragments.add(new ServiceListFragment());
        fragments.add(new CharacteristicListFragment());
        fragments.add(new CharacteristicOperationFragment());
        for (Fragment fragment : fragments) {
            getSupportFragmentManager().beginTransaction().add(R.id.fragment, fragment).hide(fragment).commit();
        }
    }

    private void updateFragment(int position) {
        if (position > fragments.size() - 1) {
            return;
        }
        for (int i = 0; i < fragments.size(); i++) {
            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
            Fragment fragment = fragments.get(i);
            if (i == position) {
                transaction.show(fragment);
            } else {
                transaction.hide(fragment);
            }
            transaction.commit();
        }
    }

    public BluetoothService getBluetoothService() {
        return mBluetoothService;
    }

    private void bindService() {
        Intent bindIntent = new Intent(this, BluetoothService.class);
        this.bindService(bindIntent, mFhrSCon, Context.BIND_AUTO_CREATE);
    }

    private void unbindService() {
        this.unbindService(mFhrSCon);
    }

    private ServiceConnection mFhrSCon = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            mBluetoothService = ((BluetoothService.BluetoothBinder) service).getService();
            mBluetoothService.setConnectCallback(callback);
            initPage();
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            mBluetoothService = null;
        }
    };

    private BluetoothService.Callback2 callback = new BluetoothService.Callback2() {

        @Override
        public void onDisConnected() {
            finish();
        }
    };
}