从列表中删除名称，同时单击按钮

我是Android Studio中的新成员，并且遇到问题。从列表中删除名称，同时单击按钮

正如您在屏幕截图中看到的，当用户写入名称并单击“添加”按钮时，将显示带有此名称和按钮的新布局以将其删除。 Screen to add players。

现在，当我进入下一个屏幕点击“进一步”时，所有名称都可见。当我想删除某个点击“删除”按钮的名称时，就会出现问题，例如我想删除大卫。大卫不应该在下一个活动中可见。不幸的是，他是。 Next activity。

这是我的代码：

TeamNamesActivity

public class TeamNamesActivity extends Activity { 

Button button_more_players; 
EditText namesBlueTeam; 
Button addPlayersBlueTeam; 
LinearLayout containerBlueTeam; 
EditText namesRedTeam; 
Button addPlayersRedTeam; 
LinearLayout containerRedTeam; 
int shortestNameLength = 3; 
ArrayList<String> names_blueTeam = new ArrayList<>(); 
ArrayList<String> names_redTeam = new ArrayList<>(); 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_team_names); 
    namesBlueTeam = (EditText)findViewById(R.id.first_player_blue); 
    namesRedTeam = (EditText)findViewById(R.id.first_player_red); 
    addPlayersBlueTeam = (Button)findViewById(R.id.more_players_blue_team); 
    addPlayersRedTeam = (Button)findViewById(R.id.more_players_red_team); 
    containerBlueTeam = (LinearLayout)findViewById(R.id.container_blue); 
    containerRedTeam = (LinearLayout)findViewById(R.id.container_red); 
} 

public void addMorePlayers_blueTeam(View view) { 
    button_more_players = (Button) findViewById(R.id.more_players_blue_team); 
    addPlayers(namesBlueTeam, containerBlueTeam, names_blueTeam); 
} 

public void addMorePlayers_redTeam(View view) { 
    button_more_players = (Button) findViewById(R.id.more_players_red_team); 
    addPlayers(namesRedTeam, containerRedTeam, names_redTeam); 
} 

public void addPlayers(EditText nameOfPlayer, LinearLayout container, List<String> playersNames) { 
    final View addView; 
    LayoutInflater layoutInflater = (LayoutInflater) getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    if(nameOfPlayer.getText().length() >= shortestNameLength) { 

     addView = layoutInflater.inflate(R.layout.activity_to_add_more_players, null); 
     TextView textOut = (TextView)addView.findViewById(R.id.textout); 
     String currentName = nameOfPlayer.getText().toString(); 
     textOut.setText(currentName); 
     playersNames.add(currentName); 

     nameOfPlayer.setText(""); 
     Button buttonRemove = (Button)addView.findViewById(R.id.remove); 
     buttonRemove.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       ((LinearLayout)addView.getParent()).removeView(addView); 
      } 
     }); 
     container.addView(addView); 

    } 
} 

public void goFurther(View view) { 

    Intent teamNamesIntent = new Intent(this, StartGameActivity.class); 
    teamNamesIntent.putExtra("names_redTeam", names_redTeam); 
    teamNamesIntent.putExtra("names_blueTeam", names_blueTeam); 
    startActivity(teamNamesIntent); 

} 

public void goFurtherWithoutNames(View view) { 
} 

public List<String> getNames_redTeam() { 
    return names_redTeam; 
} 

public List<String> getNames_blueTeam() { 
    return names_blueTeam; 
} 
}

StartGameActivity

public class StartGameActivity extends AppCompatActivity { 

ArrayList<String> names_redTeam; 
ArrayList<String> names_blueTeam; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_start_game); 
    TextView textOut = (TextView)findViewById(R.id.textout2); 
    names_redTeam = (ArrayList<String>) getIntent().getSerializableExtra("names_redTeam"); 
    names_blueTeam = (ArrayList<String>) getIntent().getSerializableExtra("names_blueTeam"); 
    textOut.setText("Red: " + names_redTeam + " ;;;;;; " + ", Blue: " + names_blueTeam); 
} 
}

布局删除

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

<Button android:id="@+id/remove" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:text="@string/remove_player" 
    /> 

<TextView android:id="@+id/textout" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_alignParentLeft="true" 
    android:layout_toLeftOf="@+id/remove" 
    />

你知道我该如何纠正它吗？ :)

来源

2016-11-04 Tomas

那么，您将名称添加到names_blueTeam和names_redTeam，并显示这些列表的内容。

问题是，当您执行删除时，您不会从中删除相应的名称，所以它们仍会出现在下一个Activity中。

像这样的东西应该工作：

public void addPlayers(EditText nameOfPlayer, LinearLayout container, 
    final List<String> playersNames) { 
    final View addView; 
    LayoutInflater layoutInflater = (LayoutInflater) getBaseContext() 
     .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

    if (nameOfPlayer.getText().length() >= shortestNameLength) { 
     addView = layoutInflater.inflate(R.layout.activity_to_add_more_players, 
      null); 
     TextView textOut = (TextView) addView.findViewById(R.id.textout); 
     final String currentName = nameOfPlayer.getText().toString(); 
     textOut.setText(currentName); 
     playersNames.add(currentName); 

     nameOfPlayer.setText(""); 
     Button buttonRemove = (Button) addView.findViewById(R.id.remove); 
     buttonRemove.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 

       // removing the name from the List 
       playersNames.remove(currentName); 

       ((LinearLayout) addView.getParent()).removeView(addView); 
      } 
     }); 
     container.addView(addView); 
    } 
}

（你也应该看看的Java Naming Conventions）

来源

2016-11-04 13:17:47 earthw0rmjim

从列表中删除名称，同时单击按钮

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