import com.google.android.things.contrib.driver.ht16k33.AlphanumericDisplay; //导入依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.i(TAG, "Starting SegmentDisplayActivity");

    try {
        mSegmentDisplay = new AlphanumericDisplay(I2C_BUS);
        mSegmentDisplay.setBrightness(1.0f);
        mSegmentDisplay.setEnabled(true);
        mSegmentDisplay.clear();
        mSegmentDisplay.display("ABCD");
    } catch (IOException e) {
        Log.e(TAG, "Error configuring display", e);
    }
}
 

import com.google.android.things.contrib.driver.ht16k33.AlphanumericDisplay; //导入依赖的package包/类
public Display(AlphanumericDisplay display) throws IOException {
    this.display = display;
    this.display.setEnabled(true);
    this.display.clear();
}
 

import com.google.android.things.contrib.driver.ht16k33.AlphanumericDisplay; //导入依赖的package包/类
public static AlphanumericDisplay openDisplay() throws IOException {
    return new AlphanumericDisplay(BOARD.getI2cBus());
}