从android中的EditText控件获取值。getext属性用于获取EditText的值:

EditText txtname = findViewById(R.id.name);
String name      =  txtname.getText().toString();

字符串值= YourEditText.getText().toString;

使用getText():

Button   mButton;
EditText mEdit;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    mButton = (Button)findViewById(R.id.button);
    mEdit   = (EditText)findViewById(R.id.edittext);

    mButton.setOnClickListener(
        new View.OnClickListener()
        {
            public void onClick(View view)
            {
                Log.v("EditText", mEdit.getText().toString());
            }
        });
}

试试这段代码

final EditText editText = findViewById(R.id.name); // your edittext id in xml
Button submit = findViewById(R.id.submit_button); // your button id in xml
submit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) 
    {
        String string = editText.getText().toString();
        Toast.makeText(MainActivity.this, string, Toast.LENGTH_SHORT).show();
    }
});

你可能还想看看黄油刀。它旨在通过使用注释来减少样板代码的数量。这里有一个简单的例子:

public class ExampleActivity extends ActionBarActivity {

    @InjectView(R.id.name)
    EditText nameEditText;

    @InjectView(R.id.email)
    EditText emailEditText;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example);
        Butterknife.inject(this);
    }

    @OnClick(R.id.submit)
    public void onSubmit() {
         Editable name = nameEditText.getText();
         Editable email = emailEditText.getText();
    }
}

只需在build.gradle中添加以下依赖项:

compile 'com.jakewharton:butterknife:x.y.z'

作为替代，还有AndroidAnnotations。

我猜你在调用EditText对象“mEdit”时必须使用这段代码:

.toString myActivity.this.mEdit.getText () ()

只需确保编译器知道要调用和使用哪个EditText。