Android基本控件

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<android.support.constraint.ConstraintLayout 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"    tools:context="cn.appio.testedit.MainActivity">    <EditText        android:id="@+id/editText1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:ems="10"        android:hint="psone"        android:imeActionId="1"        android:imeActionLabel="下一个"        android:imeOptions="actionNext"        android:inputType="text"        android:text="Name1"        tools:layout_editor_absoluteX="69dp"        tools:layout_editor_absoluteY="1dp" /></android.support.constraint.ConstraintLayout>
import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.Button;import android.widget.Toast;import android.view.KeyEvent;import android.widget.EditText;import android.widget.TextView;import android.widget.TextView.OnEditorActionListener;public class MainActivity extends AppCompatActivity {    Button btn = null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        EditText txt1 = (EditText) findViewById(R.id.editText1);        txt1.setOnEditorActionListener( new OnEditorListener());    }    private class OnEditorListener implements OnEditorActionListener {        @Override        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {            if ( actionId == 1 ) {                Toast.makeText(MainActivity.this, "你点了软键盘按钮",Toast.LENGTH_SHORT).show();            }            return false;        }    }}

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