我正在学习如何创建UI元素。我创建了一些EditText输入字段。在单击按钮时，我想捕获输入到该输入字段的内容。
<EditText android:id="@+id/name" android:width="220px" />
那是我的领域。我怎样才能获得内容？
通过使用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());
}
});
}
Button kapatButon = (Button) findViewById(R.id.islemButonKapat);
Button hesaplaButon = (Button) findViewById(R.id.islemButonHesapla);
Button ayarlarButon = (Button) findViewById(R.id.islemButonAyarlar);
final EditText ders1Vize = (EditText) findViewById(R.id.ders1Vize);
final EditText ders1Final = (EditText) findViewById(R.id.ders1Final);
final EditText ders1Ortalama = (EditText) findViewById(R.id.ders1Ortalama);
//
final EditText ders2Vize = (EditText) findViewById(R.id.ders2Vize);
final EditText ders2Final = (EditText) findViewById(R.id.ders2Final);
final EditText ders2Ortalama = (EditText) findViewById(R.id.ders2Ortalama);
//
final EditText ders3Vize = (EditText) findViewById(R.id.ders3Vize);
final EditText ders3Final = (EditText) findViewById(R.id.ders3Final);
final EditText ders3Ortalama = (EditText) findViewById(R.id.ders3Ortalama);
//
final EditText ders4Vize = (EditText) findViewById(R.id.ders4Vize);
final EditText ders4Final = (EditText) findViewById(R.id.ders4Final);
final EditText ders4Ortalama = (EditText) findViewById(R.id.ders4Ortalama);
//
final EditText ders5Vize = (EditText) findViewById(R.id.ders5Vize);
final EditText ders5Final = (EditText) findViewById(R.id.ders5Final);
final EditText ders5Ortalama = (EditText) findViewById(R.id.ders5Ortalama);
//
final EditText ders6Vize = (EditText) findViewById(R.id.ders6Vize);
final EditText ders6Final = (EditText) findViewById(R.id.ders6Final);
final EditText ders6Ortalama = (EditText) findViewById(R.id.ders6Ortalama);
//
final EditText ders7Vize = (EditText) findViewById(R.id.ders7Vize);
final EditText ders7Final = (EditText) findViewById(R.id.ders7Final);
final EditText ders7Ortalama = (EditText) findViewById(R.id.ders7Ortalama);
//
/*
*
*
* */
kapatButon.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// kapatma islemi
Toast.makeText(getApplicationContext(), "kapat",
Toast.LENGTH_LONG).show();
}
});
/*
*
*
* */
hesaplaButon.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// hesap islemi
int d1v = Integer.parseInt(ders1Vize.getText().toString());
int d1f = Integer.parseInt(ders1Final.getText().toString());
int ort1 = (int) (d1v * 0.4 + d1f * 0.6);
ders1Ortalama.setText("" + ort1);
//
int d2v = Integer.parseInt(ders2Vize.getText().toString());
int d2f = Integer.parseInt(ders2Final.getText().toString());
int ort2 = (int) (d2v * 0.4 + d2f * 0.6);
ders2Ortalama.setText("" + ort2);
//
int d3v = Integer.parseInt(ders3Vize.getText().toString());
int d3f = Integer.parseInt(ders3Final.getText().toString());
int ort3 = (int) (d3v * 0.4 + d3f * 0.6);
ders3Ortalama.setText("" + ort3);
//
int d4v = Integer.parseInt(ders4Vize.getText().toString());
int d4f = Integer.parseInt(ders4Final.getText().toString());
int ort4 = (int) (d4v * 0.4 + d4f * 0.6);
ders4Ortalama.setText("" + ort4);
//
int d5v = Integer.parseInt(ders5Vize.getText().toString());
int d5f = Integer.parseInt(ders5Final.getText().toString());
int ort5 = (int) (d5v * 0.4 + d5f * 0.6);
ders5Ortalama.setText("" + ort5);
//
int d6v = Integer.parseInt(ders6Vize.getText().toString());
int d6f = Integer.parseInt(ders6Final.getText().toString());
int ort6 = (int) (d6v * 0.4 + d6f * 0.6);
ders6Ortalama.setText("" + ort6);
//
int d7v = Integer.parseInt(ders7Vize.getText().toString());
int d7f = Integer.parseInt(ders7Final.getText().toString());
int ort7 = (int) (d7v * 0.4 + d7f * 0.6);
ders7Ortalama.setText("" + ort7);
//
Toast.makeText(getApplicationContext(), "hesapla",
Toast.LENGTH_LONG).show();
}
});
我猜你在调用“mEdit”EditText对象时必须使用这段代码：
myActivity.this.mEdit.getText().toString()
只需确保编译器知道要调用和使用哪个EditText。
从android中的EditText控件获取价值。 EditText getText财产用于获得价值EditText：
EditText txtname = findViewById(R.id.name);
String name = txtname.getText().toString();
我希望这个应该有效：
Integer.valueOf(mEdit.getText().toString());
我尝试了Integer.getInteger()方法而不是valueOf() - 它没有用。
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button rtn = (Button)findViewById(R.id.button);
EditText edit_text = (EditText)findViewById(R.id.edittext1);
rtn .setOnClickListener(
new View.OnClickListener()
{
public void onClick(View view)
{
Log.v("EditText value=", edit_text.getText().toString());
}
});
}
您可能还想看看Butter Knife。它旨在通过使用注释减少样板代码的数量。这是一个简单的例子：
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();
}
}
只需将以下依赖项添加到build.gradle：
compile 'com.jakewharton:butterknife:x.y.z'
作为替代方案，还有AndroidAnnotations。
getText(editText);
getText(button);
getText(textView);
如果你没有，只需在你的BaseActivity / create BaseActivity中创建方法。
public class BaseActivity extends AppCompatActivity{
public String getText(TextView tv) {
return tv.getText().toString().trim();
}
}
并通过此BaseActivity扩展您的所有活动。
public class YourActivity extends BaseActivity {
@Override
public void onCreate(Bundle savedInstanceState){
getText(editText);
getText(button);
getText(textView);
}
}
请注意，EditText，Button延伸TextView，因此我只创建了getText(TextView tv)。
更高级的方法是使用butterknife bindview。这消除了冗余代码。
在你的依赖关系中;添加这2行。
compile('com.jakewharton:butterknife:8.5.1') {
exclude module: 'support-compat'
}
apt 'com.jakewharton:butterknife-compiler:8.5.1'
然后同步。 MainActivity中绑定edittext的示例
import butterknife.BindView;
import butterknife.ButterKnife;
public class MainActivity {
@BindView(R.id.name) EditTextView mName;
...
public void onCreate(Bundle savedInstanceState){
ButterKnife.bind(this);
...
}
}
但是，一旦您感觉更舒服或开始使用大量数据，这是一种替代方案。
试试这个代码
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();
}
});