android studio实现满屏爱心代码

以下是一个简单的实现满屏爱心的代码：

1. 在布局文件中添加一个空的 FrameLayout

<FrameLayout
    android:id="@+id/frame_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

2. 创建一个 HeartView 类，继承自 View，并实现 onDraw 方法

public class HeartView extends View {

    private Paint mPaint;
    private Path mPath;
    private float mWidth;
    private float mHeight;

    public HeartView(Context context) {
        super(context);
        init();
    }

    public HeartView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public HeartView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.FILL);
        mPaint.setColor(Color.RED);
        mPath = new Path();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        mPath.reset();
        float x = mWidth / 2;
        float y = mHeight / 5;
        float offsetY = mHeight / 12;
        float offsetX = mWidth / 12;
        mPath.moveTo(x, y);
        mPath.cubicTo(x + offsetX, y - offsetY, x + mWidth / 2 - offsetX, y - offsetY, mWidth / 2, y + offsetY);
        mPath.cubicTo(mWidth / 2 + offsetX, y - offsetY, mWidth - offsetX, y - offsetY, x, y);
        mPath.close();
        canvas.drawPath(mPath, mPaint);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        mWidth = w;
        mHeight = h;
    }
}

3. 在 Activity 中添加以下代码，生成并添加多个 HeartView 到 FrameLayout 中

FrameLayout frameLayout = findViewById(R.id.frame_layout);
for (int i = 0; i < 50; i++) {
    HeartView heartView = new HeartView(this);
    FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    layoutParams.gravity = Gravity.CENTER;
    heartView.setLayoutParams(layoutParams);
    frameLayout.addView(heartView);
}

这样就可以在屏幕上生成多个爱心了。