封装的自定义dialog,文本编辑，EditText,按需更改

自定义的弹窗，带文本编辑，按需更改
下面是封装好的抽象类

package b2a.main.utils;

import android.content.Context;
import android.support.v7.app.AlertDialog;
import android.text.Editable;
import android.text.Selection;
import android.text.TextWatcher;
import android.view.View;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

import b2a.main.R;

/**
* Created by pc-004 on 2015/10/19.
*/
public abstract class DialogMessage {
public void dialogShowDiy(Context context, LinearLayout viewGroup, String leftTitle, String rightTitle,
String leftBtn, String rightBtn, String eText) {

final AlertDialog dialog = new AlertDialog.Builder(context).create();
dialog.setView(viewGroup);
TextView txtvTitleLeft = (TextView) viewGroup.findViewById(R.id.txtv_tile_left);
final TextView txtvTitleRight = (TextView) viewGroup.findViewById(R.id.txtv_title_right);
TextView txtvBtnLeft = (TextView) viewGroup.findViewById(R.id.txtv_left_btn);
TextView txtvBtnRight = (TextView) viewGroup.findViewById(R.id.txtv_right_btn);
final EditText editText = (EditText) viewGroup.findViewById(R.id.etxt_area);
editText.setText(eText);
txtvTitleLeft.setText(leftTitle);
txtvTitleRight.setText(rightTitle);
txtvBtnLeft.setText(leftBtn);
txtvBtnRight.setText(rightBtn);
txtvBtnLeft.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
leftBtnClick(editText);
dialog.cancel();
}
});

txtvBtnRight.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
rightBtnClick(editText);
dialog.cancel();
}
});

editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {

}

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
txtvTitleRight.setText(editText.length() + "/" + "300字");
Editable editable = editText.getText();
int len = editable.length();
if (len > 300) {
int selEndIndex = Selection.getSelectionEnd(editable);
String str = editable.toString();
//截取新字符串
String newStr = str.substring(0, 300);
editText.setText(newStr);
editable = editText.getText();

//新字符串的长度
int newLen = editable.length();
//旧光标位置超过字符串长度
if (selEndIndex > newLen) {
selEndIndex = editable.length();
}
//设置新光标所在的位置
Selection.setSelection(editable, selEndIndex);

}
}

@Override
public void afterTextChanged(Editable s) {

}
});

dialog.show();
}

/**
* 自定义dialog
*/
public abstract void leftBtnClick(EditText editText);

public abstract void rightBtnClick(EditText editText);
}

在activity或者是fragment中使用时，要实现这个抽象类

DialogMessage dialogMessage = new DialogMessage() {
@Override
public void leftBtnClick(EditText editText) {
}

@Override
public void rightBtnClick(EditText editText) {

}
};

dialogMessage.dialogShowDiy(context,
(LinearLayout) View.inflate(context, R.layout.dialog_input_area, null),
input, "",
context.getResources().getString(R.string.cancle),
 context.getResources().getString(R.string.save), etxt);