Question

我想在网格布局中显示不同的图像的 MainActivity.java

    b1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if(isReadStorageAllowed()){
                        Intent intent = new Intent(MainActivity.this, GridActivity.class);
intent.putExtra("firstKeyName","FirstKeyValue");
intent.putExtra("secondKeyName","SecondKeyValue");
                        MainActivity.this.startActivity(intent);

                }
            });

我想在GridLayout中显示图片我的 GridActivity.java 代码如下

Intent intent;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
intent = getIntent();
// Get the view from new_activity.xml
setContentView(R.layout.activity_grid);


GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));

gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    public void onItemClick(AdapterView<?> parent,
                            View v, int position, long id){
    }
});

在ImageAdapter中，我希望获得MainActivity的意图值，以便在图像中使用它（使用不同按钮在单个视图上使用不同的图像）

ImageAdapter.java

public class ImageAdapter extends BaseAdapter {
    private Context mContext;

    // Constructor
    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;

        /*if (convertView == null) {*/
        imageView = new ImageView(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(350, 350));
        imageView.setScaleType(ImageView.ScaleType.FIT_START);
        imageView.setPadding(8, 8, 8, 8);
        /*}
        else
        {
            imageView = (ImageView) convertView;
        }*/
        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

    // Keep all Images in array
    public Integer[] mThumbIds = {
            R.drawable.b1, R.drawable.b2, R.drawable.b3,
            R.drawable.b4, R.drawable.b5, R.drawable.b6,
            R.drawable.b7, R.drawable.b8, R.drawable.b9,
            R.drawable.b10, R.drawable.b11, R.drawable.b12,
    };

Answer 1

public class ImageAdapter extends BaseAdapter {
    private Context mContext;

    // Constructor
    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

    @Override
    public Object getItem(int i) {
        return mThumbIds[i];
    }

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


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;

    /*if (convertView == null) {*/
        imageView = new ImageView(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(350, 350));
        imageView.setScaleType(ImageView.ScaleType.FIT_START);
        imageView.setPadding(8, 8, 8, 8);
    /*}
    else
    {
        imageView = (ImageView) convertView;
    }*/
        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

    // Keep all Images in array
    public Integer[] mThumbIds = {
            R.drawable.b1, R.drawable.b2, R.drawable.b3,
            R.drawable.b4, R.drawable.b5, R.drawable.b6,
            R.drawable.b7, R.drawable.b8, R.drawable.b9,
            R.drawable.b10, R.drawable.b11, R.drawable.b12,
    };
}

在同一个Gridview Android上显示不同的图像

1 个答案: