How can I set the focus (and display the keyboard)

问题:

I have a layout which contains some views like this:

<LinearLayout>
<TextView...>
<TextView...>
<ImageView ...>
<EditText...>
<Button...>
</linearLayout>

How can I set the focus (display the keyboard) on my EditText programmatically?

I've tried this and it works only when I launch my Activity normally, but when I launch it in a TabHost, it doesn't work.

txtSearch.setFocusableInTouchMode(true);
txtSearch.setFocusable(true);
txtSearch.requestFocus();

回答1:

Try this:

EditText editText = (EditText) findViewById(R.id.myTextViewId);
editText.requestFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);

http://developer.android.com/reference/android/view/View.html#requestFocus()

回答2:

use:

editText.requestFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);

回答3:

showSoftInput was not working for me at all.

I figured I needed to set the input mode : android:windowSoftInputMode="stateVisible" (here in the Activity component in the manifest)

Hope this help!

回答4:

This worked for me, Thanks to ungalcrys

Show keyboard:

editText = (EditText)findViewById(R.id.myTextViewId);
editText.requestFocus();
InputMethodManager imm = (InputMethodManager)getSystemService(this.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,InputMethodManager.HIDE_IMPLICIT_ONLY);

Hide keyboard:

InputMethodManager imm = (InputMethodManager) getSystemService(this.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);

回答5:

final EditText tb = new EditText(this);
tb.requestFocus();
tb.postDelayed(new Runnable() {
    @Override
    public void run() {
        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        inputMethodManager.showSoftInput(tb, InputMethodManager.SHOW_IMPLICIT);
    }
}, 1000);

回答6:

Here is how a kotlin extension for showing and hiding the soft keyboard can be made:

fun View.showKeyboard() {
  this.requestFocus()
  val inputMethodManager = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
  inputMethodManager.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT)
}

fun View.hideKeyboard() {
  val inputMethodManager = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
  inputMethodManager.hideSoftInputFromWindow(windowToken, 0)
}

Then you can just do this:

editText.showKeyboard()
// OR
editText.hideKeyboard()

回答7:

Here is KeyboardHelper Class for hiding and showing keyboard

import android.content.Context;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

/**
 * Created by khanhamza on 06-Mar-17.
 */

public class KeyboardHelper {

    public static void hideSoftKeyboard(Context context, View view) {
        if (context == null) {
            return;
        }

        InputMethodManager imm = (InputMethodManager) context
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(view.getWindowToken(), 0);

    }

    public static void hideSoftKeyboard(Context context, EditText editText) {

        InputMethodManager imm = (InputMethodManager) context
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
    }


    public static void openSoftKeyboard(Context context, EditText editText) {
        InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
    }

}

回答8:

I couldn't get any of these answers to work on their own. The solution for me was to combine them:

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);
editText.requestFocus();
imm.showSoftInput(editText, InputMethodManager.SHOW_FORCED);

I'm not sure why that was required for me -- according to the docs it seems that either method should have worked on their own.