Android 将按钮可点击属性设置为 false
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Set button clickable property to false
提问by Joyson
I need to disable the click-eventfor a button in Android. Just as a sample, I have tried doing the following. I have taken a TextViewnamed it (entered a text) as Name. The condition checks if, TextViewis empty button and clickable should be set to false. However this does not happen when the Toast is printed. Can somemone tell me the reason. Also if the text field is not empty I want to reset the clickable eventfor button as true.
我需要禁用click-eventAndroid 中的按钮。作为示例，我尝试执行以下操作。我已将其TextView命名（输入文本）作为Name。条件检查是否TextView为空按钮，并且可点击应设置为 false。但是，打印 Toast 时不会发生这种情况。谁能告诉我原因。此外，如果文本字段不为空，我想将clickable eventfor 按钮重置为 true。
Java File:
Java文件：
public class ButtonclickabkeActivity extends Activity {
TextView tv;
Button btn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv = (TextView) findViewById(R.id.textView1);
tv.setText("Name");
btn = (Button) findViewById(R.id.button1);
if (tv.getText().toString().length() != 0) {
btn.setClickable(false);
Toast.makeText(getApplicationContext(), "" + tv.getText().toString().length(), Toast.LENGTH_LONG).show();
} else {
btn.setClickable(true);
}
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Toast.makeText(getApplicationContext(), "Button clicked", Toast.LENGTH_LONG).show();
}
});
}
}
XML file:
XML文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"/>
<TextView
android:text="TextView"
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:text="Button"
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
回答by user370305
Use
用
btn.setEnable(false);
instead of
代替
btn.setClickable(false);
回答by Steven
User 370305 is correct. .setEnableis what your looking for. Or you could use android:clickablein the layout XML file.
用户 370305 是正确的。.setEnable是您要找的。或者您可以android:clickable在布局 XML 文件中使用。
回答by Tim Kruichkov
In my case
就我而言
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
view.setEnabled(false);
}
});
