Question

我正在开发一个具有gridview布局的主屏幕的应用程序。就目前而言，我正在用DP号码硬编码盒子的高度和宽度，我显然不想这样做。如何创建将决定用户的代码＆＃39;屏幕大小并相应地匹配框，以便有像笔记的大手机的人会看到与机器人mini上的人相同的东西？ IE，当每边硬编码到500dp时，它看起来像这样： enter image description here

但我的目标是在每个屏幕尺寸上看起来像这样： enter image description here

目前，这是我的Java代码：

公共类ActivityAdapter扩展了BaseAdapter {

//Array of Icons that will be used as menu choices
public static int[] imageOptions = {
        R.drawable.vacation_quota, //Position 0
        R.drawable.revenue_deficit, //Position 1
            //+ many more options...
    };

private Context context;

//Constructor to pass context back to Main class
public ActivityAdapter(Context applicationContext) {

    context = applicationContext;
}

//Number of elements to be displayed on the grid
@Override
public int getCount() {

    return imageOptions.length;
}

@Override
public View getView(int position, View convertView, ViewGroup arg2) {
    ImageView iv;
    if(convertView != null){
        iv = (ImageView) convertView;
    } else {
        iv = new ImageView(context);

                    //Here I have it hard coded to match a 480px width. Here is where I need to change it, just not sure how
        iv.setLayoutParams(new GridView.LayoutParams(240, 240));

        iv.setScaleType(ScaleType.CENTER_CROP); //Center the cropping

    }

    //Sets the image to correspond to its position within the array.
    iv.setImageResource(imageOptions[position]);
    return iv;
}

有什么想法吗？我认为逻辑上我想弄清楚屏幕尺寸并使用它们来使图像尺寸匹配，只是不确定如何。来自其他线程的研究没有太大帮助，所以希望我能通过代码发布得到一个更简单的答案。

Answer 1

你应该得到屏幕的宽度和高度。然后使用这些值动态设置每个单元格的高度和宽度

Answer 2

试试这段代码 -

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle state) {
        setContentView(new ViewGroup(this) {
            private RelativeLayout[] items = new RelativeLayout[9];
            private int width, height, itemWidth, itemHeight;
            {
                Random r = new Random();
                for (int i = 0; i < 9; i++) {
                    items[i] = new RelativeLayout(getContext());
                    float[] hsv = new float[] {360 * r.nextFloat(), .50f, .75f};
                    items[i].setBackgroundColor(Color.HSVToColor(hsv));
                    addView(items[i]);

                    // UPDATE ////////////////////////////////////
                    ImageView image = new ImageView(getContext());
                    switch (i) {
                    case 0: // top left
                    case 1: // top center
                    case 2: // top right
                    case 3: // center left
                    case 4: // center center
                    case 5: // center right
                    case 6: // bottom left
                    case 7: // bottom center
                    case 8: // bottom right
                        image.setImageResource(R.drawable.ic_launcher);
                        break;
                    }
                    image.setScaleType(ScaleType.FIT_XY);
                    image.setLayoutParams(new RelativeLayout.LayoutParams(
                            RelativeLayout.LayoutParams.MATCH_PARENT,
                            RelativeLayout.LayoutParams.MATCH_PARENT
                    ));
                    items[i].addView(image);
                    //////////////////////////////////////////////
                }
            }
            @Override
            protected void onMeasure(int wMS, int hMS) {
                width = MeasureSpec.getSize(wMS);
                height = MeasureSpec.getSize(hMS);
                itemWidth = width / 3;
                itemHeight = height / 3;
                wMS = MeasureSpec.makeMeasureSpec(itemWidth, MeasureSpec.EXACTLY);
                hMS = MeasureSpec.makeMeasureSpec(itemHeight, MeasureSpec.EXACTLY);
                measureChildren(wMS, hMS);
                setMeasuredDimension(width, height);
            }
            @Override
            protected void onLayout(boolean changed, int l, int t, int r, int b) {
                for (int i = 0; i < 9; i++) {
                    l = itemWidth * (i % 3);
                    t = itemHeight * (i / 3);
                    r = l + itemWidth;
                    b = t + itemHeight;
                    items[i].layout(l, t, r, b);
                }
            }
        });
        super.onCreate(state);
    }

}

输出 -

enter image description here

编辑 -

要创建可滚动网格视图，请参阅此http://www.androidhive.info/2012/02/android-gridview-layout-tutorial/

Answer 3

我最终无法使用此处的一些建议，并且必须使用弃用的方法来保留我的应用结构。我特别添加的代码是：

        iv = new ImageView(context);

        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        Display display = wm.getDefaultDisplay();

        float width2 = display.getWidth();

        int length = (int) (width2/2);

        iv.setLayoutParams(new GridView.LayoutParams(length, length));

这样，根据屏幕的大小，高度和宽度将裁剪为正确的尺寸。

Android：如何在Java代码中制作相等比例的gridview

3 个答案: