Question

使用以下代码导出图像，但是因为我指定的文件大小为40 80 120，因为它创建的每个图像都具有相同的大小。应考虑默认图像大小，并应创建@ 2x和@ 3x图像。

public class page2 extends ActionBarActivity {
    ImageView b2;
    int count = 0;
    Handler handler = null;
    Handler handler1 = null;
    Runnable j = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_page2);

        Intent c = getIntent();
        String name = c.getStringExtra("t");
        Toast.makeText(getApplicationContext(), name, Toast.LENGTH_SHORT).show();

        b2 = (ImageView) findViewById(R.id.redball);

        // Animation animation = AnimationUtils.loadAnimation(page2.this, R.anim.fade);
        // Animation animation1 = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.activity_move);

        // b2.startAnimation(animation);
        // b2.startAnimation(animation1);
        b2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                count = count + 1;
                Intent intentVibrate = new Intent(getApplicationContext(), VibrateService.class);
                startService(intentVibrate);
            }
        });

        handler1 = new Handler();
        j = new Runnable() {
            public void run() {

                AbsoluteLayout.LayoutParams absParams =
                        (AbsoluteLayout.LayoutParams) b2.getLayoutParams();

                DisplayMetrics displaymetrics = new DisplayMetrics();
                getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
                int width = displaymetrics.widthPixels;
                int height = displaymetrics.heightPixels;

                Random r = new Random();

                absParams.x = r.nextInt(width);
                absParams.y = r.nextInt(height);
                b2.setLayoutParams(absParams);
                Animation animation = AnimationUtils.loadAnimation(page2.this, R.anim.fade);
                b2.startAnimation(animation);
                handler1.postDelayed(j, 870);
            }
        };
        handler1.postDelayed(j, 50);

        handler = new Handler();

        final Runnable t = new Runnable() {
            public void run() {
                Intent d = new Intent(getApplicationContext(), Page3.class);
                d.putExtra("count", count);
                d.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(d);
            }
        };

        handler.postDelayed(t, 8000);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_page2, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onBackPress(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            handler.removeCallbacks(t);
            return true;
        }

        return super.onKeyDown(keyCode, event);
    }
}

Answer 1

以下是我发现基于默认图像生成@ 2x和@ 3x的解决方案：

# grab the identify string, make sure it succeeded
IMG_CHARS=$(identify "${file}" 2> /dev/null) || die "${file} is not a proper image"

# grab width and height
IMG_CHARS=$(echo "${IMG_CHARS}" | sed -n 's/\(^.*\)\ \([0-9]*\)x\([0-9]*\)\ \(.*$\)/\2 \3/p')

width=$(echo "${IMG_CHARS}" | awk '{print $1}')
height=$(echo "${IMG_CHARS}" | awk '{print $2}')

cp -p "$filename" "$png"
  sips -Z "$(($width * 1))" "$(($height * 1))" "$png"

cp -p "$filename" "$twopng"
  sips -Z "$(($width * 2))" "$(($height * 2))" "$twopng"

cp -p "$filename" "$threepng"
  sips -Z "$(($width * 3))" "$(($height * 3))" "$threepng"

从Sketch到Xcode导出ImageSets @ 2x和@ 3x尺寸

1 个答案: