开发中经常需要为用户提供一个单独的搜索页面，这里做一下记录。

先贴上最终的效果：

1.输入框背景，通过定义drawable实现：

2.布局文件：

3.代码

public class SearchActivity extends BaseActivity implements TextWatcher, TextView.OnEditorActionListener {    private static final String TAG = SearchActivity.class.getSimpleName();    private EditText mEditTextSearch;    private TextView mTextViewDoSearch;    private ImageView mImageViewClear;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mEditTextSearch.addTextChangedListener(this);        mEditTextSearch.setOnEditorActionListener(this);        mTextViewDoSearch.setOnClickListener(this);        mImageViewClear.setOnClickListener(this);        mEditTextSearch.setInputType(InputType.TYPE_CLASS_NUMBER);    }    @Override    public void initView() {        setContentView(R.layout.activity_search_bed);        mEditTextSearch = (EditText) findViewById(R.id.title_bar_search_et);        mTextViewDoSearch = (TextView) findViewById(R.id.title_bar_right_text);        mImageViewClear = (ImageView) findViewById(R.id.title_bar_iv_clear);    }    @Override    public void beforeTextChanged(CharSequence s, int start, int count, int after) {        Log.d(TAG, "beforeTextChanged()  s==" + s);    }    @Override    public void onTextChanged(CharSequence s, int start, int before, int count) {        Log.d(TAG, "onTextChanged() s==" + s);    }    @Override    public void afterTextChanged(Editable s) {        Log.d(TAG, "afterTextChanged() s==" + s);        String content = s.toString().trim();        if (TextUtils.isEmpty(content)) {            mTextViewDoSearch.setText("取消");            mImageViewClear.setVisibility(View.GONE);        } else {            mTextViewDoSearch.setText("搜索");            mImageViewClear.setVisibility(View.VISIBLE);        }    }    @Override    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {        Log.d(TAG, "onEditorAction() content==" + v.getText());        return false;    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.title_bar_right_text:                if ("取消".equals(((TextView) v).getText().toString())) {                    onBackPressed();                } else {                    //搜索操作                }                break;            case R.id.title_bar_iv_clear:                mEditTextSearch.setText("");                break;        }        super.onClick(v);    }}