Android custom View soft keyboard to implement search

1. xml文件中加入自定义 搜索view

<com.etoury.etoury.ui.view.IconCenterEditText
      android:id="@+id/search_et"
      style="@style/StyleEditText"
      android:hint="搜索景点信息"
      />

2. 自定义的 view java文件

IconCenterEditText.java
package com.etoury.etoury.ui.view;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
public class IconCenterEditText extends EditText implements View.OnFocusChangeListener, View.OnKeyListener {
  private static final String TAG = IconCenterEditText.class.getSimpleName();
  /**
   * 是否是默认图标再左边的样式
   */
  private boolean isLeft = false;
  /**
   * 是否点击软键盘搜索
   */
  private boolean pressSearch = false;
  /**
   * 软键盘搜索键监听
   */
  private OnSearchClickListener listener;
  public void setOnSearchClickListener(OnSearchClickListener listener) {
    this.listener = listener;
  }
  public IconCenterEditText(Context context) {
    this(context, null);
    init();
  }
  public IconCenterEditText(Context context, AttributeSet attrs) {
    this(context, attrs, android.R.attr.editTextStyle);
    init();
  }
  public IconCenterEditText(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init();
  }
  private void init() {
    setOnFocusChangeListener(this);
    setOnKeyListener(this);
  }
  @Override
  protected void onDraw(Canvas canvas) {
    if (isLeft) { // 如果是默认样式，则直接绘制
      super.onDraw(canvas);
    } else { // 如果不是默认样式，需要将图标绘制在中间
      Drawable[] drawables = getCompoundDrawables();
      Drawable drawableLeft = drawables[0];
      Drawable drawableRight = drawables[2];
      translate(drawableLeft, canvas);
      translate(drawableRight, canvas);
//      if (drawableLeft != null) {
//        float textWidth = getPaint().measureText(getHint().toString());
//        int drawablePadding = getCompoundDrawablePadding();
//        int drawableWidth = drawableLeft.getIntrinsicWidth();
//        float bodyWidth = textWidth + drawableWidth + drawablePadding;
//
//        canvas.translate((getWidth() - bodyWidth - getPaddingLeft() - getPaddingRight()) / 2, 0);
//      }
//      if (drawableRight != null) {
//        float textWidth = getPaint().measureText(getHint().toString()); // 文字宽度
//        int drawablePadding = getCompoundDrawablePadding(); // 图标间距
//        int drawableWidth = drawableRight.getIntrinsicWidth(); // 图标宽度
//        float bodyWidth = textWidth + drawableWidth + drawablePadding;
//        setPadding(getPaddingLeft(), getPaddingTop(), (int)(getWidth() - bodyWidth - getPaddingLeft()), getPaddingBottom());
//        canvas.translate((getWidth() - bodyWidth - getPaddingLeft()) / 2, 0);
//      }
      super.onDraw(canvas);
    }
  }
  public void translate(Drawable drawable, Canvas canvas) {
    if (drawable != null) {
      float textWidth = getPaint().measureText(getHint().toString());
      int drawablePadding = getCompoundDrawablePadding();
      int drawableWidth = drawable.getIntrinsicWidth();
      float bodyWidth = textWidth + drawableWidth + drawablePadding;
      if (drawable == getCompoundDrawables()[0]) {
        canvas.translate((getWidth() - bodyWidth - getPaddingLeft() - getPaddingRight()) / 2, 0);
      } else {
        setPadding(getPaddingLeft(), getPaddingTop(), (int)(getWidth() - bodyWidth - getPaddingLeft()), getPaddingBottom());
        canvas.translate((getWidth() - bodyWidth - getPaddingLeft()) / 2, 0);
      }
    }
  }
  @Override
  public void onFocusChange(View v, boolean hasFocus) {
    Log.d(TAG, "onFocusChange execute");
    // 恢复EditText默认的样式
    if (!pressSearch && TextUtils.isEmpty(getText().toString())) {
      isLeft = hasFocus;
    }
  }
  @Override
  public boolean onKey(View v, int keyCode, KeyEvent event) {
    pressSearch = (keyCode == KeyEvent.KEYCODE_ENTER);
    if (pressSearch && listener != null) {
      /*隐藏软键盘*/
      InputMethodManager imm = (InputMethodManager) v.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
      if (imm.isActive()) {
        imm.hideSoftInputFromWindow(v.getApplicationWindowToken(), 0);
      }
      listener.onSearchClick(v);
    }
    return false;
  }
  public interface OnSearchClickListener {
    void onSearchClick(View view);
  }
}

3. style

</style> 
      <style name="StyleEditText">
      <item name="android:layout_width">match_parent</item>
      <item name="android:layout_height">wrap_content</item>
      <item name="android:background">@drawable/bg_search_bar</item>
      <item name="android:drawablePadding">5dp</item>
      <item name="android:gravity">center_vertical</item>
      <item name="android:imeOptions">actionSearch</item>
      <item name="android:drawableLeft">@drawable/icon_search</item>
      <item name="android:padding">5dp</item>
      <item name="android:singleLine">true</item>
      <item name="android:textColorHint">@color/grey</item>
      <item name="android:textSize">16sp</item>
      <item name="android:hint">搜索</item>
    </style>

4. bg_search_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
  <solid android:color="@android:color/white" />
  <stroke
    android:width="1px"
    android:color="@android:color/darker_gray" />
  <corners android:radius="3dp" />
</shape>

5. activity 中加上代码

private IconCenterEditText search_et;
search_et = (IconCenterEditText) findViewById(R.id.search_et);
search_et.setOnSearchClickListener(new OnSearchClickListener() {
      @Override
      public void onSearchClick(View view) {
        // TODO Auto-generated method stub
        String texts = search_et.getText().toString().trim();
        if ("".equals(texts)) {
          ToastUtil.showToast("请输入您要搜索的内容");
        } else {
          //根据你的文字内容实现跳转          Intent intent = new Intent(context,
              SearchWordActivity.class);
          // intent.putExtra("searchMode", 1);
          intent.putExtra("searchWord", texts);
          context.startActivity(intent);
        }
      }
    });

   

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