java - 无法使 EditText 成为多行

Question

我正在制作一个用于存储笔记的 Android 应用程序。在单击按钮之前，我已使 editText 的行为类似于 textView 。单击编辑按钮使 editText 生效。现在，当我保存该值并显示它时，就会出现问题。 EditText 没有像我想要的那样以多行形式出现，而是以单行形式出现。

我在 xml 文件中将 editText 的 inputType 属性声明为多行，但在初始化 editText 的代码中，我将其 inputType 属性设置为 null ，试图使其既为 null 又为多行，但是唉!这不会发生。

下面是我的 xml 和 java 代码:

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"


<android.support.v7.widget.Toolbar
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:theme="@style/AppTheme.AppBarOverlay"
    android:background="@color/colorToolBar"
    android:id="@+id/idToolbarNoteDetails"
    android:padding="10dp"/>


<android.support.design.widget.FloatingActionButton
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:id="@+id/idFloatingActionButtonEdit"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    app:srcCompat="@android:drawable/ic_menu_edit"
    android:layout_margin="20dp"/>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Colors: "
    android:textStyle="italic"
    android:visibility="invisible"
    android:id="@+id/idTextViewColors"
    android:layout_below="@+id/idToolbarNoteDetails"
    android:layout_margin="10dp"
    android:textSize="15dp"/>

<TextView
    android:layout_width="25dp"
    android:layout_height="25dp"
    android:id="@+id/idColorRed"
    android:visibility="invisible"
    android:layout_margin="10dp"
    android:layout_below="@+id/idToolbarNoteDetails"
    android:layout_toRightOf="@+id/idTextViewColors"
    android:background="@drawable/textview_circle_red" />

<TextView
    android:layout_width="25dp"
    android:layout_height="25dp"
    android:visibility="invisible"
    android:id="@+id/idColorBlue"
    android:layout_margin="10dp"
    android:layout_below="@id/idToolbarNoteDetails"
    android:layout_toRightOf="@+id/idColorRed"
    android:background="@drawable/textview_circle_blue"/>

<TextView
    android:layout_width="25dp"
    android:layout_height="25dp"
    android:id="@+id/idColorGreen"
    android:visibility="invisible"
    android:layout_margin="10dp"
    android:layout_below="@id/idToolbarNoteDetails"
    android:layout_toRightOf="@+id/idColorBlue"
    android:background="@drawable/textview_circle_green"/>

<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/idTextViewColors"
    android:layout_margin="10dp"
    android:inputType="textShortMessage"
    android:background="@android:color/transparent"
    android:textSize="40sp"
    android:hint="Title"
    android:textStyle="bold"
    android:id="@+id/idEditTextTitle"/>

<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/idEditTextTitle"
    android:hint="Content"
    android:inputType="textMultiLine"
    android:lines="5"
    android:gravity="top|left"
    android:layout_margin="10dp"
    android:textSize="20sp"
    android:background="@android:color/transparent"
    android:id="@+id/idEditTextContent"/>

<EditText
    android:layout_width="250dp"
    android:id="@+id/idEditTextTag"
    android:layout_height="35dp"
    android:hint="#TAG"
    android:background="@android:color/transparent"
    android:layout_alignParentBottom="true"
    android:textSize="15dp"
    android:textStyle="italic"
    android:layout_margin="10dp"/>

<android.support.design.widget.FloatingActionButton
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:id="@+id/idFloatingActionButtonSave"
    android:layout_above="@+id/idFloatingActionButtonEdit"
    android:layout_margin="20dp"
    android:visibility="invisible"
    app:srcCompat="@android:drawable/ic_menu_save"
    android:layout_alignParentRight="true"/>

JAVA

package mynotes.pawanjotsingh.com.mynotes.activities;

import android.content.Intent;
import android.graphics.Color;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.text.InputType;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import mynotes.pawanjotsingh.com.mynotes.R;
import mynotes.pawanjotsingh.com.mynotes.adapters.RecyclerAdapter;
import mynotes.pawanjotsingh.com.mynotes.dbhelper.DataBaseHelper;
import mynotes.pawanjotsingh.com.mynotes.models.NoteModel;

public class NoteDetailsActivity extends AppCompatActivity {

enum Colors{RED, BLUE, GREEN, WHITE}

DataBaseHelper  dataBaseHelper;
FloatingActionButton floatingActionButtonEdit,floatingActionButtonSave;
EditText editTextTitle,editTextContent,editTextTag;
String stringTitle,stringContent,stringTag;
TextView textViewColors,textViewRed,textViewBlue,textViewGreen;
Toolbar toolbar;
int color,colorRed,colorBlue,colorGreen;

String id="";

Colors currentBackgroundColour = Colors.WHITE;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_note_details);

    editTextTitle=(EditText) findViewById(R.id.idEditTextTitle);
    editTextTitle.setInputType(InputType.TYPE_NULL);

    editTextContent=(EditText) findViewById(R.id.idEditTextContent);
    editTextContent.setInputType(InputType.TYPE_NULL);

    editTextTag=(EditText) findViewById(R.id.idEditTextTag);
    editTextTag.setInputType(InputType.TYPE_NULL);

    toolbar=(Toolbar) findViewById(R.id.idToolbarNoteDetails);
    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setTitle("Edit");

    toolbar.setNavigationOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            onBackPressed();
        }
    });

    dataBaseHelper=new DataBaseHelper(this);

    textViewColors=(TextView) findViewById(R.id.idTextViewColors);
    textViewRed=(TextView) findViewById(R.id.idColorRed);
    textViewBlue=(TextView) findViewById(R.id.idColorBlue);
    textViewGreen=(TextView) findViewById(R.id.idColorGreen);

    colorRed=Color.parseColor("#FE7676");
    colorBlue=Color.parseColor("#76FEEC");
    colorGreen=Color.parseColor("#99FE76");

    stringTitle=getIntent().getStringExtra("text_title");
    stringContent=getIntent().getStringExtra("text_content");
    stringTag=getIntent().getStringExtra("text_tag");
    id = getIntent().getStringExtra("id");
    color=getIntent().getIntExtra("color", Color.WHITE);
    getWindow().getDecorView().setBackgroundColor(color);


    editTextTitle.setText(stringTitle);
    editTextContent.setText(stringContent);
    editTextTag.setText(stringTag);


    floatingActionButtonSave=(FloatingActionButton) findViewById(R.id.idFloatingActionButtonSave);
    floatingActionButtonSave.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           save();
        }
    });


    floatingActionButtonEdit=(FloatingActionButton) findViewById(R.id.idFloatingActionButtonEdit);
    floatingActionButtonEdit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            floatingActionButtonSave.setVisibility(View.VISIBLE);
            Animation animationLeft=AnimationUtils.loadAnimation(getApplicationContext(),R.anim.move_left);
            floatingActionButtonSave.startAnimation(animationLeft);

            textViewColors.setVisibility(View.VISIBLE);
            Animation animationDown= AnimationUtils.loadAnimation(getApplicationContext(),R.anim.move_down);
            textViewColors.startAnimation(animationDown);

            textViewRed.setVisibility(View.VISIBLE);
            textViewRed.startAnimation(animationDown);

            textViewBlue.setVisibility(View.VISIBLE);
            textViewBlue.startAnimation(animationDown);

            textViewGreen.setVisibility(View.VISIBLE);
            textViewGreen.startAnimation(animationDown);
            editNote();


        }
    });

    textViewRed.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            currentBackgroundColour=Colors.RED;
            getWindow().getDecorView().setBackgroundColor(Color.parseColor("#FE7676"));
        }
    });

    textViewBlue.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            currentBackgroundColour=Colors.BLUE;
            getWindow().getDecorView().setBackgroundColor(Color.parseColor("#76FEEC"));
        }
    });

    textViewGreen.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           currentBackgroundColour = Colors.GREEN;
            getWindow().getDecorView().setBackgroundColor(Color.parseColor("#99FE76"));
        }
    });

}


@Override
public void onBackPressed() {
    Intent intent=new Intent(this,MainActivity.class);
    startActivity(intent);
}


public void editNote(){


    editTextTitle.setInputType(InputType.TYPE_CLASS_TEXT);
    editTextTitle.setFocusable(true);
    editTextTitle.requestFocus();

    editTextContent.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_MULTI_LINE);


    editTextTag.setInputType(InputType.TYPE_CLASS_TEXT);



}

public void save() {


    int colour=Color.WHITE;

    switch (currentBackgroundColour){
        case RED:
            colour = colorRed;
            break;
        case BLUE:
            colour = colorBlue;
            break;
        case GREEN:
            colour = colorGreen;
            break;
    }


    final NoteModel noteModel = new NoteModel();
    noteModel.setTitle(editTextTitle.getText().toString());
    noteModel.setContent(editTextContent.getText().toString());
    noteModel.setTag(editTextTag.getText().toString());
    noteModel.setId(id);
    noteModel.setDate(getDateTime());
    noteModel.setColor(colour);

    boolean isModified=dataBaseHelper.editNote(noteModel);
    if(isModified==true){
        Toast.makeText(this, "Modifications saved", Toast.LENGTH_SHORT).show();

      finish();

    }
    else Toast.makeText(this, "Unable to save modifications", Toast.LENGTH_SHORT).show();

}

private String getDateTime() {
    SimpleDateFormat dateFormat = new SimpleDateFormat(
            "dd-MM-yyyy HH:mm:ss", Locale.getDefault());
    Date date = new Date();
    return dateFormat.format(date);
}

屏幕截图链接

This image is when I click edit button. This works just fine, text goes to another line.

This image is when i click the save button. The text goes back to single line instead of multi-line.

Answer 1

好吧，我知道当我单击编辑按钮时会出现问题。单击该按钮会使 editText 自动变为单行，尽管我已经非常清楚地提到了 InputType 作为 XML 中的多行。

为了使 editText 在单击按钮后成为多行，我在 onClick 按钮代码内的 java 文件中编写了 editTextContent.setSingleLine(false); 。就是这样。 :)