Android Studio onClick下拉列表没有填充 - 初学者

时间：2018-02-19 18:54:14

标签： android-studio kotlin

难以置信的基本问题。

我正在关注＆＃34;你好世界＆＃34; Android Studio教程找到了here，并且遇到了非常基本的问题。

在MainActivity中创建函数后，在Android Studio的onClick下拉列表中找不到该函数。

我已尝试将该功能设置为公共，重建项目，同步和无效缓存/重新启动无效。作为Android Studio的完全初学者，我不知道接下来要去哪里看。

感谢。

package com.example.hcaelxxam.myfirstapp_v2

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.View

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
}

fun sendMessage(view: View) {
    // Do something in response to button
}

}

enter image description here

5 个答案:

答案 0 :(得分：0)

根据您提供的内容，我只能猜测找到解决方案。你真的在编辑@Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { if (i == lastpostion) { // if the user clicked here before then we set it on pause viewselected = getViewByPosition(i, listView); play = viewselected.findViewById(R.id.play); pause = viewselected.findViewById(R.id.pause); play.setVisibility(View.GONE); pause.setVisibility(View.VISIBLE); //maybe after you pause it isFound variable should go to false; } else { // else we make play visible isfound = true; play = view.findViewById(R.id.play); pause = view.findViewById(R.id.pause); play.setVisibility(View.VISIBLE); pause.setVisibility(View.GONE); lastpostion = i; } } 吗？

使用layouts/activity_main.xml，您只需在kotlin-extensions方法中使用以下语法：

onCreate

答案 1 :(得分：0)

This tutorial?

我遇到了同样的问题（IntelliJ Ultimate 2018.1）。我通过以下方法解决了这个问题：

  1. 将活动编辑器从“设计”视图切换到“文本”视图，
  2. 将光标置于<Button>标记的末尾（但仍在其内部）
  3. 按下 Ctrl + Space 打开“自动完成”对话框，
  4. 选择android:onClick
  5. 然后（在双引号中）再次按 Ctrl + Space ，然后选择（在我的情况下，唯一的选择）sendMessage

希望这会有所帮助。

答案 2 :(得分：0)

像您一样定义click方法之后，运行#!/usr/bin/python from __future__ import print_function import getopt, sys, os training_basedir = "" sphinxbinpath = "" sphinxpath = "" def find_paths(): global training_basedir global sphinxbinpath global sphinxpath # Find the location of the files, it can be libexec or lib or lib64 currentpath = os.path.dirname(os.path.realpath(__file__)) sphinxbinpath = os.path.realpath(currentpath + "/../libexec/sphinxtrain") if os.path.exists(currentpath + "/../lib/sphinxtrain/bw"): sphinxbinpath = os.path.realpath(currentpath + "/../lib/sphinxtrain/bw") if os.path.exists(currentpath + "/../bin/Release/Win32"): sphinxbinpath = os.path.realpath(currentpath + "/../bin/Release/Win32") # Find the location for the libraries sphinxpath = os.path.realpath(currentpath + "/../lib/sphinxtrain") if os.path.exists(currentpath + "/../lib64/sphinxtrain/scripts/00.verify"): sphinxpath = os.path.realpath(currentpath + "/../lib64/sphinxtrain") if os.path.exists(currentpath + "/../scripts/00.verify"): sphinxpath = os.path.realpath(currentpath + "/..") if not (os.path.exists(sphinxbinpath + "/bw") or os.path.exists(sphinxbinpath + "/bw.exe")): print("Failed to find sphinxtrain binaries. Check your installation") exit(1) # Perl script want forward slashes training_basedir = os.getcwd().replace('\\', '/'); sphinxpath = sphinxpath.replace('\\','/') sphinxbinpath = sphinxbinpath.replace('\\','/') print("Sphinxtrain path:", sphinxpath) print("Sphinxtrain binaries path:", sphinxbinpath) def setup(task): if not os.path.exists("etc"): os.mkdir("etc") print("Setting up the database " + task) out_cfg = open("./etc/sphinx_train.cfg", "w") for line in open(sphinxpath + "/etc/sphinx_train.cfg", "r"): line = line.replace("___DB_NAME___", task) line = line.replace("___BASE_DIR___", training_basedir) line = line.replace("___SPHINXTRAIN_DIR___", sphinxpath) line = line.replace("___SPHINXTRAIN_BIN_DIR___", sphinxbinpath) out_cfg.write(line) out_cfg.close() out_cfg = open("etc/feat.params", "w") for line in open(sphinxpath + "/etc/feat.params", "r"): out_cfg.write(line) out_cfg.close() steps = [ "000.comp_feat/slave_feat.pl", "00.verify/verify_all.pl", "0000.g2p_train/g2p_train.pl", "01.lda_train/slave_lda.pl", "02.mllt_train/slave_mllt.pl", "05.vector_quantize/slave.VQ.pl", "10.falign_ci_hmm/slave_convg.pl", "11.force_align/slave_align.pl", "12.vtln_align/slave_align.pl", "20.ci_hmm/slave_convg.pl", "30.cd_hmm_untied/slave_convg.pl", "40.buildtrees/slave.treebuilder.pl", "45.prunetree/slave.state-tying.pl", "50.cd_hmm_tied/slave_convg.pl", "60.lattice_generation/slave_genlat.pl", "61.lattice_pruning/slave_prune.pl", "62.lattice_conversion/slave_conv.pl", "65.mmie_train/slave_convg.pl", "90.deleted_interpolation/deleted_interpolation.pl", "decode/slave.pl", ] def run_stages(stages): for stage in stages.split(","): for step in steps: name = step.split("/")[0].split(".")[-1] if name == stage: ret = os.system(sphinxpath + "/scripts/" + step) if ret != 0: exit(ret) def run_from(stage): found = False for step in steps: name = step.split("/")[0].split(".")[-1] if name == stage or found: found = True ret = os.system(sphinxpath + "/scripts/" + step) if ret != 0: exit(ret) def run(): print("Running the training") for step in steps: ret = os.system(sphinxpath + "/scripts/" + step) if ret != 0: exit(ret) def usage(): print ("") print ("Sphinxtrain processes the audio files and creates and acoustic model ") print ("for CMUSphinx toolkit. The data needs to have a certain layout ") print ("See the tutorial http://cmusphinx.sourceforge.net/wiki/tutorialam ") print ("for details") print ("") print ("Usage: sphinxtrain [options] <command>") print ("") print ("Commands:") print (" -t <task> setup - copy configuration into database") print (" [-s <stage1,stage2,stage3>] [-f <stage>] run - run the training or just selected stages") def main(): try: opts, args = getopt.getopt(sys.argv[1:], "ht:s:f:", ["help", "task", "stages", "from"]) except getopt.GetoptError as err: print(str(err)) usage() sys.exit(-1) task = None stages = None from_stage = None for o, a in opts: if o in ("-t", "--task"): task = a if o in ("-f", "--from"): from_stage = a if o in ("-s", "--stages"): stages = a if o in ("-h", "--help"): usage() if len(args) == 0: usage() sys.exit(-1) command = args[0] find_paths() if command == "setup": if task == None: print("No task name defined") sys.exit(-1) setup(task) elif command == "run": if stages != None: run_stages(stages) elif from_stage != None: run_from(from_stage) else: run() else: run() if __name__ == "__main__": main() 和opt

答案 3 :(得分：0)

您知道您的代码是在 Kotlin 中编写的吗？对我造成问题的原因是，当我需要 Java 解决方案时，我正在使用 Kotlin 解决方案。尝试改变

class MainActivity : AppCompatActivity() {
        override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
            setContentView(R.layout.activity_main)
        }
    
        /** Called when the user taps the Send button */
        fun sendMessage(view: View) {
            // Do something in response to button
        }
    }

到

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    /** Called when the user taps the Send button */
    public void sendMessage(View view) {
        // Do something in response to button
    }
}

答案 4 :(得分：0)

同一个教程，就我而言，问题是在 MainActivity.java 中注释掉了 sendMessage() 方法

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