如何使我的按钮将文本更改为我想要的随机文本？ （ADT）

Question

当我尝试将文本更改为我想要的其他文本时，我遇到了一些问题，但是没有用。但这并不重要。我刚开始我的项目，这是我的MainActivity：

package com.what.ever;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            return rootView;
        }
    }

}

你能给我一个代码，用按钮（字符串/按钮1）改变我的文本（spring / text1）到我写的随机文本吗？有点像：

textOne = (TextView) findViewById(R.id.textik);
                pushMe = (Button) findViewById(R.id.button1);}

                final String[] myNicknames = {"Tom", "John", "Nikolaj", "Gabriel"};

            pushMe.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                int rando = (int) (Math.random() *4);
                textOne.setText(myNicknames[rando]);

            }
        });
        }

如果有效，我将非常感激！ ：3

Answer 1

你可以试试这个。你必须在片段的onCreateView（）中找到你的按钮和Textview。这会奏效。

 @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
                    View rootView = inflater.inflate(R.layout.fragment_main, container, false);

                        textOne = (TextView) rootView.findViewById(R.id.textik);
                        pushMe = (Button) rootView.findViewById(R.id.button1);
                        final String[] myNicknames = {"Tom", "John", "Nikolaj", "Gabriel"};

                    pushMe.setOnClickListener(new View.OnClickListener() {

                        @Override
                        public void onClick(View arg0) {
                        int rando = (int) (Math.random() % 4);
                        textOne.setText(myNicknames[rando]);
                       }
                });

                    return rootView;
                }

Answer 2

final  String[] Textlist = { "Text1", "Text2", "Text3"};

TextView yourTextView = (TextView)findViewById(R.id.yourTextView);

Random random = new Random();

String randomText = TextList[random.nextInt(TextList.length)];

yourTextView.setText(randomText);