Android开发，首次运行正常，以后运行不能显示图片和gallery

Question

问题RT
首次运行的话界面上的内容都有显示，关闭程序后从启动器运行，所有的图片和gallery的view都不出现了，这个是为什么，应该怎么解决注：没有报错，系统android4.1

Answer 1

gallery是在哪初始化和加载图片数据的

Answer 2

呃，好的，现在附上代码 
这个是activity
package com.example.welshelf;import controller.Controller;
import controller.WelCenWeekAdapter;
import controller.WelController;
import view.Carousel;
import view.WelCenterView;
import view.WelLeftView;
import view.WelRightView;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.Toast;public class WelcomeActivity extends Activity {

private static final String TAG="WelcomeActivity";

private WelCenterView center;
private WelRightView right;
private WelLeftView left;
private Carousel carousel;
private Context mContext;
private WelController cenController;
public static int cur_screen = 1;

private void log(String msg){
Log.e(TAG, msg);
}    public void onCreate(Bundle savedInstanceState) {
    
     mContext = this;
        super.onCreate(savedInstanceState);
        carousel = new Carousel(mContext);
        
        center = new WelCenterView(mContext);
        center.addViews();
        right = new WelRightView(mContext);
        right.addViews();
        left = new WelLeftView(mContext);
        left.addViews();
        
        carousel.addView(left);
        carousel.addView(center);
        carousel.addView(right);
        setContentView(carousel);
        
        toast("on create");
    } protected void onStart() {
toast("on start");
super.onStart();
cenController = WelController.getInstance(center, mContext);
        carousel.setCurrentScreenIndex(cur_screen);
cenController.init();
}

private void toast(String msg){

Toast.makeText(mContext, msg, Toast.LENGTH_SHORT).show();
}
}

Answer 3

Controller
package controller;import java.util.Date;import com.example.welshelf.R;import view.WelCenterView;
import model.CourseModel;
import model.Model;
import android.content.Context;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Gallery;
import android.widget.ImageView;/*
 * Singleton pattern
 */
public class WelController implements Controller { private static WelController instance;
private WelCenterView mView;
private Model mModel;
private Context mContext;
private static int dateSelect;
private CourseModel[] courses;
protected int weekno=10;

public static int getDateSelect(){
return dateSelect;
} private WelController(View view, Context context) {
mView = (WelCenterView) view;
mContext = context;
dateSelect = new Date().getDay();
} public static WelController getInstance(View view, Context context) {
instance = instance == null ? new WelController(view, context) : instance;
return instance;
} public void init() {
bindData();
} public View getView() {
return mView;
} public Controller getController() {
return this;
} public Model getModel() {
return mModel;
} private void bindData() {
int index = mView.BOOK;
ImageView book = (ImageView) mView.getChildAt(index);
book.setImageResource(R.drawable.ic_launcher); final Gallery course;
final Gallery week;
index = mView.COURSE;
course = (Gallery)mView.getChildAt(index);
course.setAdapter(new WelCenCourseAdapter(mContext));

index = mView.WEEK;
week = (Gallery)mView.getChildAt(index);
week.setAdapter(new WelCenWeekAdapter(mContext));
week.setSelection(dateSelect);
week.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
dateSelect = arg2;
WelCenCourseAdapter adapter = (WelCenCourseAdapter) course.getAdapter();
adapter.notifyDataSetChanged();
loadCourse(dateSelect, weekno);

int index = mView.BOOK;
ImageView book = (ImageView) mView.getChildAt(index);
book.setImageResource(R.drawable.ic_launcher);
}
public void onNothingSelected(AdapterView<?> arg0) {
}
});



} protected void loadCourse(int weekday, int weekno) {

}}

Answer 4

从oncreate和onstart进入
主要由binddata来进行显示