滑动图库应用

时间:2016-07-20 21:50:08

标签: android android-studio

我目前正在开发一个类似于图库应用的应用。应用程序需要从资源文件夹加载一些图像,当用户选择一个图像时,应用程序应加载所选图像,如果用户滑动屏幕,应用程序应加载下一个图像或上一个图像。

我遇到的问题是,当我点击图片时,应用程序始终会加载第一张图片。我尝试使用int来解决它,但程序给了我一个错误。

我在android编程方面很新,对不起,如果这是一个简单的问题。

以下是该应用的代码:

主要活动:

package com.example.erasor.pruebaslide;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

public void Image1 (View view) {
    Intent intent= new Intent(this, Slide.class);
    startActivity(intent);
}

public void Image2 (View view) {
    Intent intent = new Intent(this, Slide.class);
    intent.putExtra("position", 2);
    startActivity(intent);
}
}

幻灯片活动:

package com.example.erasor.pruebaslide;

import android.content.Context;
import android.content.Intent;
import android.support.v4.view.PagerAdapter;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;


public class Slide extends AppCompatActivity {



private CustomPagerAdapter mCustomPagerAdapter;


private ViewPager mViewPager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_slide);

    Intent intent = getIntent();
    int position = intent.getIntExtra("position", 0);

    mCustomPagerAdapter = new CustomPagerAdapter(this);

    mViewPager = (ViewPager) findViewById(R.id.container);
    mViewPager.setAdapter(mCustomPagerAdapter);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

}

int[] mResources = {
        R.drawable.image1,
        R.drawable.image2,
        R.drawable.image3,
        R.drawable.image4,
};

class CustomPagerAdapter extends PagerAdapter {

    Context mContext;
    LayoutInflater mLayoutInflater;

    public CustomPagerAdapter(Context context) {
        mContext = context;
        mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return mResources.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == ((RelativeLayout) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        View itemView = mLayoutInflater.inflate(R.layout.fragment_slide, container, false);

        ImageView imageView = (ImageView) itemView.findViewById(R.id.image);
        imageView.setImageResource(mResources[position]);

        container.addView(itemView);

        return itemView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object    object) {
        container.removeView((RelativeLayout) object);
    }
}
}

1 个答案:

答案 0 :(得分:0)

我认为你错过了告诉mViewPager要显示哪个位置的部分,试试这个:

www.mydomain.con/industries/accounting/<anything>