类似这样EditText 搜索框，hiht 提示有一个icon并且text内容。
重写EditText ：
package mobi.truekey.weapp2.widget; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.widget.EditText; import mobi.truekey.weapp2.R; public class SearchView extends EditText { private float searchSize = 0; private float textSize = 0; private int textColor = 0xFF000000; private Drawable mDrawable; private Paint paint; public SearchView(Context context, AttributeSet attrs) { super(context, attrs); InitResource(context, attrs); InitPaint(); } private void InitResource(Context context, AttributeSet attrs) { TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.searchedit); float density = context.getResources().getDisplayMetrics().density; searchSize = mTypedArray.getDimension(R.styleable.searchedit_imagewidth, 18 * density + 0.5F); textColor = mTypedArray.getColor(R.styleable.searchedit_textColor, 0xFF848484); textSize = mTypedArray.getDimension(R.styleable.searchedit_textSize, 14 * density + 0.5F); mTypedArray.recycle(); } private void InitPaint() { paint = new Paint(Paint.ANTI_ALIAS_FLAG); paint.setColor(textColor); paint.setTextSize(textSize); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); DrawSearchIcon(canvas); } private void DrawSearchIcon(Canvas canvas) { if (this.getText().toString().length() == 0) { float textWidth = paint.measureText("搜索"); float textHeight = getFontLeading(paint); float dx = (getWidth() - searchSize - textWidth - 8) / 2; float dy = (getHeight() - searchSize) / 2; canvas.save(); canvas.translate(getScrollX() + dx, getScrollY() + dy); if (mDrawable != null) { mDrawable.draw(canvas); } canvas.drawText("搜索", getScrollX() + searchSize + 8, getScrollY() + (getHeight() - (getHeight() - textHeight) / 2) - paint.getFontMetrics().bottom - dy, paint); canvas.restore(); } } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); if (mDrawable == null) { try { mDrawable = getContext().getResources().getDrawable(R.drawable.search); mDrawable.setBounds(0, 0, (int) searchSize, (int) searchSize); } catch (Exception e) { } } } @Override protected void onDetachedFromWindow() { if (mDrawable != null) { mDrawable.setCallback(null); mDrawable = null; } super.onDetachedFromWindow(); } public float getFontLeading(Paint paint) { Paint.FontMetrics fm = paint.getFontMetrics(); return fm.bottom - fm.top; } }
attr：
<declare-styleable name="searchedit"> <attr name="imagewidth" format="dimension" /> <attr name="textSize" format="dimension" /> <attr name="textColor" format="color" /> </declare-styleable>
drawable背景：
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <corners android:radius="6dp" /> <solid android:color="@color/white" /> </shape>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。