使用JAVA代码实现Android布局

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  • RelativeLayout布局设置

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    int screenWidth = ScreenUtils.getScreenWidth(getBaseContext());//获取屏幕高度
    int onew = screenWidth / 5;
    int s1 = onew / 3;
    int magnification = ScreenUtils.dip2px(getBaseContext(), 50) / 50;//获取屏幕高度并算出dp和px的倍数
    ViewGroup.LayoutParams layoutParams = tongzhi_dot.getLayoutParams();
    RelativeLayout.LayoutParams layoutParams2 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    layoutParams2.setMargins(screenWidth - s1 - 15, magnification * 10, s1, 35 * magnification);//4个参数按顺序分别是左上右下
    tongzhi_dot.setLayoutParams(layoutParams2); //tongzhi_dot 一个View的布局ID

  • LinearLayout

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    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    lp.setMargins(10, 20, 30, 40);
    imageView.setLayoutParams(lp);

  • LinearLayout 设置高宽

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    LinearLayout box = (LinearLayout) layout.findViewById(R.id.dialog_liner_box);
    box.setLayoutParams(new LinearLayout.LayoutParams((int) (ScreenUtils.getScreenWidth(context) * 0.8), ViewGroup.LayoutParams.WRAP_CONTENT));

ScreenUtils 分享

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import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.WindowManager;

/**
 * 获得屏幕相关的辅助类
 * 
 * 
 */
public class ScreenUtils {

	/**
	 * 获得屏幕高度
	 * 
	 * @param context
	 * @return
	 */
	public static int getScreenWidth(Context context) {
		WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		return outMetrics.widthPixels;
	}

	/**
	 * 获得屏幕宽度
	 * 
	 * @param context
	 * @return
	 */
	public static int getScreenHeight(Context context) {
		WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		return outMetrics.heightPixels;
	}

	/**
	 * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
	 */
	public static int dip2px(Context context, float dpValue) {
		float scale = context.getResources().getDisplayMetrics().density;
		return (int) (dpValue * scale + 0.5f);
	}

	/**
	 * 根据手机的分辨率从 px(像素) 的单位 转成为 dp
	 */
	public static int px2dip(Context context, float pxValue) {
		float scale = context.getResources().getDisplayMetrics().density;
		return (int) (pxValue / scale + 0.5f);
	}



	/**
	 * 根据手机的分辨率从 sp 的单位 转成为 px(像素)
	 */
	public static int sp2px(Context context, float spValue) {
		float scale = context.getResources().getDisplayMetrics().scaledDensity;
		return (int) (spValue * scale + 0.5f);
	}

	/**
	 * 根据手机的分辨率从 px(像素) 的单位 转成为 sp
	 */
	public static int px2sp(Context context, float pxValue) {
		float scale = context.getResources().getDisplayMetrics().scaledDensity;
		return (int) (pxValue / scale + 0.5f);
	}


	/**
	 * 获得状态栏的高度
	 * 
	 * @param context
	 * @return
	 */
	public static int getStatusHeight(Context context) {

		int statusHeight = -1;
		try {
			Class<?> clazz = Class.forName("com.android.internal.R$dimen");
			Object object = clazz.newInstance();
			int height = Integer.parseInt(clazz.getField("status_bar_height").get(object).toString());
			statusHeight = context.getResources().getDimensionPixelSize(height);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return statusHeight;
	}

	/**
	 * 获取当前屏幕截图，包含状态栏
	 * 
	 * @param activity
	 * @return
	 */
	public static Bitmap snapShotWithStatusBar(Activity activity) {
		View view = activity.getWindow().getDecorView();
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache();
		Bitmap bmp = view.getDrawingCache();
		int width = getScreenWidth(activity);
		int height = getScreenHeight(activity);
		Bitmap bp = null;
		bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
		view.destroyDrawingCache();
		return bp;

	}

	/**
	 * 获取当前屏幕截图，不包含状态栏
	 * 
	 * @param activity
	 * @return
	 */
	public static Bitmap snapShotWithoutStatusBar(Activity activity) {
		View view = activity.getWindow().getDecorView();
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache();
		Bitmap bmp = view.getDrawingCache();
		Rect frame = new Rect();
		activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
		int statusBarHeight = frame.top;

		int width = getScreenWidth(activity);
		int height = getScreenHeight(activity);
		Bitmap bp = null;
		bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight);
		view.destroyDrawingCache();
		return bp;

	}

}