TextView 换行对齐自定义_android textview换行左对齐

 
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;
 
/**
 * 左对齐，然后 右边换行对齐，解决自动换行不整齐问题
 * lzx
 */
public class AlignTextView extends TextView {
    private String text;
    private float textSize;
    private int textColor;
    private int paddingRight;
    private int paddingLeft;
    private Paint paint;
    private float textShowWidth;//可展示文本的宽度
    private float LineSpacing = 0f;
 
    public AlignTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        textSize = getTextSize();
        LineSpacing = getLineSpacingExtra();
        textColor = getCurrentTextColor();
        paddingLeft = getPaddingLeft();
        paddingRight = getPaddingRight();
    }
 
    @Override
    protected void onDraw(Canvas canvas) {
        if (paint == null) {
            paint = getPaint();
            paint.setAntiAlias(true);
            paint.setColor(textColor);
        }
        textShowWidth = canvas.getWidth() - paddingRight - paddingLeft;
        int lineCount = 1;
        text = this.getText().toString();
        char[] textCharArray = text.toCharArray();
        float drawedWidth = 0;
        float charWidth = paint.measureText(textCharArray, 0, 1);
        for (int i = 0; i < textCharArray.length; i++) {
            if (textCharArray[i] == '\n') {
                lineCount++;
                drawedWidth = 0;
                continue;
            }
            if (textShowWidth - drawedWidth < charWidth) {
                lineCount++;
                drawedWidth = 0;
            }
            canvas.drawText(textCharArray, i, 1, drawedWidth + paddingLeft,
                    (lineCount) * textSize + (LineSpacing * (lineCount - 1)), paint);
            drawedWidth += charWidth;
        }
    }
 
}

就是取第一个字符，然后作为标准，绘制不到就换行，于是就不存在字符占用位置不够的问题

Java 文件