Question

我正在尝试在Pebble上显示128px * 128px图像，通过AppMessage从Android发送。

在Android应用中，我有一个BitmapFactory ARGB_8888 bmp，我这样做：

byte pbi[] = new byte[16*128];      
for(int i = 0; i < 128; i++) {
    for(int j = 0; j < 128; j++) {
        if(bmp.getPixel(i, j) >= 0x7FFFFFFF) {
            pbi[i*16] |= 1 << (j % 8);        //set pixel (white)
        }
        pbi[i*16] &= ~(1 << (j % 8));         //explicitly set = 0 (black)
    }
}

PebbleDictionary data;
byte send[];
for (int k = 0; k < 128; k++){
    data = new PebbleDictionary();
    send = new byte[16];
    send = Arrays.copyOfRange(pbi, k*16, (k+1)*16-1);
    data.addBytes(KEY_IMG, send);
    data.addInt16(KEY_ROW, (byte)k);
    PebbleKit.sendDataToPebble(getApplicationContext(), PEBBLE_APP_UUID, data);
}

Pebble有：

static int transNum;
static uint8_t received[128][16] = {0};

static void in_received_handler(DictionaryIterator *iter, void *context) {
    Tuple *img_tuple = dict_find(iter, KEY_IMG);
    Tuple *row_tuple = dict_find(iter, KEY_ROW);
    if (img_tuple && row_tuple) {
        memcpy(img_data[(int)(row_tuple->value->cstring)], img_tuple->value->data, 16);
    }
}

应该通过以下方式显示：

static void window_load(Window *window) {
    static Window *window;
    static BitmapLayer *img_layer;
    static GBitmap img;

    static void window_load(Window *window) {
        L    img_layer = bitmap_layer_create( (GRect) {
        .origin = {8, 20},
        .size = {128, 128}
    });


    img = (GBitmap) {
        .addr = img_data,
        .bounds = GRect(8, 20, 128, 128),
        .row_size_bytes = 16,
    };

    bitmap_layer_set_bitmap(img_layer, &img);
    bitmap_layer_set_alignment(img_layer, GAlignCenter);
    layer_add_child(window_get_root_layer(window), bitmap_layer_get_layer(img_layer));
    display_no_img();    
}

但在window_load上，我得到了预期的黑色方块，但我无法确定如何加载接收到的数据。

编辑：我很难保持上面的代码更新，但它很有代表性。我希望有人可以告诉我该怎么做才能加载收到的字节。我以为秘密在.addr = img_data，唉......谢谢。

Answer 1

你应该看一下Pebble-faces example。它使用JavaScript，但你可以完全重用C部分，只需更改电话代码。

通过AppMessage在Pebble上显示图像

1 个答案: