新人求助，是关于Android主线程和子线程的问题

Question

在编一个百度地图校园导航的程序，程序有时候能运行，有时候不能运行，不能运行时会报这个： android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
麻烦各位朋友帮我看看该怎么改OnCreate方法中的代码

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

     . . . . . .

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        SDKInitializer.initialize(getApplicationContext());
        SDKInitializer.setCoordType(CoordType.BD09LL);
        setContentView(R.layout.activity_main);
        position=(TextView)  findViewById(R.id.position_text_view) ;
        accessPermission();
        initView();
        initLocation();
        Button mbutton1=(Button)findViewById(R.id.button1);
        mbutton1.setOnClickListener(MainActivity.this);
        Button mbutton2=(Button)findViewById(R.id.button2);
        mbutton2.setOnClickListener(MainActivity.this);
        mbutton3=(Button)findViewById(R.id.button3);
        mbutton3.setOnClickListener(MainActivity.this);
        mbutton4=(Button)findViewById(R.id.button4);
        mbutton4.setOnClickListener(MainActivity.this);
        mbutton5=(Button)findViewById(R.id.button5);
        mbutton5.setOnClickListener(MainActivity.this);
    }

           . . . . . . 

        @Override
    public void onClick(View v){
        switch(v.getId()){
            case R.id.button1:
                if((flag%2)==0){
                    mbutton3.setVisibility(View.VISIBLE);
                    mbutton4.setVisibility(View.VISIBLE);
                    mbutton5.setVisibility(View.VISIBLE);
                    flag+=1;

                }else if((flag%2)==1){
                    mbutton3.setVisibility(View.GONE);
                    mbutton4.setVisibility(View.GONE);
                    mbutton5.setVisibility(View.GONE);
                    flag+=1;
                }
                break;
            case R.id.button2:
                initNavi();
                startBikeNavi();
                break;
            case R.id.button3:
                Toast.makeText(MainActivity.this,"请在地图上长按您要去的地方设置目的地",Toast.LENGTH_LONG).show();
                mbutton3.setVisibility(View.GONE);
                mbutton4.setVisibility(View.GONE);
                mbutton5.setVisibility(View.GONE);
                break;
            case R.id.button4:
                Toast.makeText(MainActivity.this,"你点击了button2",Toast.LENGTH_LONG).show();
                mbutton3.setVisibility(View.GONE);
                mbutton4.setVisibility(View.GONE);
                mbutton5.setVisibility(View.GONE);
                break;
            case R.id.button5:
                Toast.makeText(MainActivity.this,"你点击了button2",Toast.LENGTH_LONG).show();
                mbutton3.setVisibility(View.GONE);
                mbutton4.setVisibility(View.GONE);
                mbutton5.setVisibility(View.GONE);
                break;
            default:
                break;
        }
    }

Answer 1

安卓主线程，，，UI线程，，是不允许做耗时操作的，，，

你需要用个new一个子线程去完成耗时操作，，然后给主线程结果。