我的 EditText 限制为 150 个字符:

 <EditText
    android:id="@+id/editText1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#fff"
    android:layout_marginBottom="50dp"
    android:padding="30dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:maxLength="150"
    android:gravity="top|left"
    android:lineSpacingMultiplier="1.8"
    android:inputType="textMultiLine|textCapSentences" >
</EditText>

TextView :

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="100dp"
 />

新 Activity :

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;


public class NewActivity extends Activity {




private TextView textView1;
private EditText editText1;

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


    final ImageButton a = (ImageButton) findViewById(R.id.imageBack);
    a.setOnClickListener(new OnClickListener()  {

        @Override
        public void onClick(View arg0) {
            Animation anim =              AnimationUtils.loadAnimation(NewActivity.this, R.anim.animation);
            a.startAnimation(anim);

            Intent intent = new Intent(NewActivity.this,MainActivity.class);
            startActivity(intent);

            editText1.addTextChangedListener(new TextWatcher()
            {
                @Override
                public void onTextChanged(CharSequence s, int start, int before, int count)
                {
                }

                @Override
                public void beforeTextChanged(CharSequence s, int start, int count, int aft)                                                                           
                {
                }

                @Override
                public void afterTextChanged(Editable s)
                {
                   // this will show characters remaining
                    textView1.setText(150 - s.toString().length() + "/150");
                }
            });


        }
    });




}}

我想在页面的右上角创建一个小框，您可以在其中查看剩余的字符数，例如 132/150，我曾尝试在 stackoverflow 上查看其他解决方案，但我无法获得它们去工作。

最佳答案

你可以这样做

mEditText.addTextChangedListener(new TextWatcher()
{
    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count)
    {
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int aft                                                                           
    {
    }

    @Override
    public void afterTextChanged(Editable s)
    {
       // this will show characters remaining
        countTextView.setText(150 - s.toString().length() + "/150");
    }
});

关于java - Android:字符在 EditText 中离开倒计时，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22686153/