LoginAutoCompleteEdit.java

package net.coding.program.common.widget;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.TextView;

import net.coding.program.R;
import net.coding.program.common.enter.SimpleTextWatcher;
import net.coding.program.model.AccountInfo;

public class LoginAutoCompleteEdit extends AutoCompleteTextView {
    private static final String TAG = "LoginAutoCompleteEdit";

    private boolean mDisableAuto = false;

    private String[] emailSufixs;

    public LoginAutoCompleteEdit(Context context) {
        super(context);
        init(context, null);
    }

    public LoginAutoCompleteEdit(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    public LoginAutoCompleteEdit(Context context, AttributeSet attrs,
                                 int defStyle) {
        super(context, attrs, defStyle);
        init(context, attrs);
    }

    private void init(final Context context, AttributeSet attrs) {
        //adapter中使用默认的emailSufixs中的数据，可以通过setAdapterString来更改
        final String[] email = new String[]{
                "@qq.com", "@163.com", "@gmail.com", "@126.com", "@sina.com", "@sohu.com",
                "@hotmail.com", "@tom.com", "@sina.cn", "@foxmail.com", "@yeah.net", "@vip.qq.com", "@139.com", "@live.cn", "@outlook.com", "@aliyun.com", "@yahoo.com", "@live.com", "@icloud.com", "@msn.com", "@21cn.com", "@189.cn", "@me.com", "@vip.sina.com", "@msn.cn", "@sina.com.cn"
        };

        boolean emailOnly = false;
        boolean useDark = false;
        boolean closeAutoComplete = false;
        TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.AutoComplete, 0, 0);
        try {
            emailOnly = a.getBoolean(R.styleable.AutoComplete_emailOnly, false);
            useDark = a.getBoolean(R.styleable.AutoComplete_darkness, false);
            closeAutoComplete = a.getBoolean(R.styleable.AutoComplete_closeAutoComplete, true);
        } finally {
            a.recycle();
        }

        // 添加删除箭头
        int crossedRes = useDark ? R.drawable.delete_edit_login : R.drawable.delete_edit_login_black;
        drawable = getResources().getDrawable(crossedRes);
        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
        addTextChangedListener(new SimpleTextWatcher() {
            @Override
            public void afterTextChanged(Editable s) {
                displayDelete(s.length() > 0);
            }
        });

        if (!emailOnly) {
            String[] relogins = AccountInfo.loadAllRelogininfo(context);
            emailSufixs = new String[email.length + relogins.length];
            System.arraycopy(relogins, 0, emailSufixs, 0, relogins.length);
            System.arraycopy(email, 0, emailSufixs, relogins.length, email.length);
        } else {
            emailSufixs = email;
        }

        if (closeAutoComplete) {
            this.setAdapter(new EmailAutoCompleteAdapter(context, R.layout.login_auto_complete_item, emailSufixs));
            this.setThreshold(1);
        }
    }

    private Drawable drawable;

    private void displayDelete(boolean show) {
        if (show) {
            setDrawableRight(drawable);
        } else {
            setDrawableRight(null);
        }
    }

    private void setDrawableRight(Drawable drawable) {
        setCompoundDrawables(null, null, drawable, null);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {
            if (getCompoundDrawables()[2] != null) {
                boolean touchable = event.getX() > (getWidth() - getTotalPaddingRight())
                        && (event.getX() < ((getWidth() - getPaddingRight())));

                if (touchable) {
                    this.setText("");
                }
            }
        }

        return super.onTouchEvent(event);
    }

    @Override
    protected void replaceText(CharSequence text) {
        String t = this.getText().toString();
        int index = t.indexOf("@");
        if (index != -1) {
            super.replaceText(t.substring(0, index) + text);
        } else {
            super.replaceText(text);
        }
    }

    public void setDisableAuto(boolean mDisableAuto) {
        this.mDisableAuto = mDisableAuto;
    }

    @Override
    protected void performFiltering(CharSequence text, int keyCode) {
        //adapter中数据的前半部分，那么adapter中的这条数据将会在下拉框中出现
//        Log.i(TAG + " performFiltering", text.toString() + "   " + keyCode);
        if (mDisableAuto) {
            return;
        }

        String t = text.toString();

        int index = t.indexOf("@");
        if (index != -1) {
            super.performFiltering(t.substring(index), keyCode);
        } else {
            super.performFiltering(text, keyCode);
        }
    }

    private class EmailAutoCompleteAdapter extends ArrayAdapter<String> {

        public EmailAutoCompleteAdapter(Context context, int textViewResourceId, String[] email_s) {
            super(context, textViewResourceId, email_s);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            Log.i(TAG, "in GetView");
            View v = convertView;
            if (v == null)
                v = LayoutInflater.from(getContext()).inflate(
                        R.layout.login_auto_complete_item, null);
            TextView tv = (TextView) v.findViewById(R.id.tv);

            String input = LoginAutoCompleteEdit.this.getText().toString();
            int index = input.indexOf("@");
            if (index != -1) {
                input = input.substring(0, index);
                tv.setText(input + getItem(position));
            } else {
                tv.setText(getItem(position));
            }
            return v;
        }
    }
}