:
public class MainActivity extends AppCompatActivity {
ArrayList<String> addArray = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText editTextOne = (EditText) findViewById(R.id.editTextOne);
final EditText editTextTwo = (EditText) findViewById(R.id.editTextTwo);
Button btn_showText = (Button) findViewById(R.id.buttonShow);
final TextView textView = (TextView) findViewById(R.id.textResults);
Button btn_refresh = (Button) findViewById(R.id.btn_refresh);
Button btn_close = (Button) findViewById(R.id.btn_close);
Button btn_save = (Button) findViewById(R.id.btn_save);
final ListView showMe = (ListView) findViewById(R.id.list_items);
btn_showText.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String text = editTextOne.getText().toString();
String textTwo = editTextTwo.getText().toString();
if (text.length() == 0 || textTwo.length() == 0){
textView.setText("You must enter Name & Surname");
}else {
textView.setText(Html.fromHtml(
"<font color=\"red\">"+ text + "</font> " +
"<font color=\"blue\"><b>" + textTwo + " </b></font>"));
}
}
});
btn_refresh.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
startActivity(getIntent());
}
});
btn_close.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
System.exit(0);
}
});
btn_save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Context context = getApplicationContext();
// CharSequence mytext = "Hahahaha";
// int duration = Toast.LENGTH_SHORT;
// Toast toast = Toast.makeText(context,mytext,duration);
// toast.show();
String text = editTextOne.getText().toString();
String textTwo = editTextTwo.getText().toString();
String getInput = text + textTwo;
if (addArray.contains(getInput)){
Toast.makeText(getBaseContext(), "Item already Added!", Toast.LENGTH_LONG).show();
}
else if (getInput == null || getInput.trim().equals("")){
Toast.makeText(getBaseContext(), "Input field is empty", Toast.LENGTH_LONG).show();
}
else{
addArray.add(getInput);
ArrayAdapter<String> adapter = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, addArray);
showMe.setAdapter(adapter);
Intent intent = new Intent(MainActivity.this, ListOfNames.class);
((EditText)findViewById(R.id.editTextOne)).setText(" ");
((EditText)findViewById(R.id.editTextTwo)).setText(" ");
}
}
});
}
public void onButtonClick(View v){
if (v.getId() == R.id.btn_list){
Intent i = new Intent(MainActivity.this, ListOfNames.class);
startActivity(i);
}
}
}
ListOfNames二アクティビティ:
コードが
MainActivity(最初の活動)でありますそれは簡単になります。ただ、このような意図でのArrayListを渡す:
ArrayList<String> list = new ArrayList<String>();
Intent intent = new Intent(ActivityOne.this, ActivityTwo.class);
intent.putStringArrayListExtra("key", list);
startActivity(intent);
そして、このようActivityTwoでそれを受け取る:
ArrayList<String> list = getIntent().getStringArrayListExtra("key");
さらに詳細?はい。エラーログはどうですか? –
私の2回目の解決策として私の答えを見てください。アプリはバグなしで実行されますが、私のarraylistに2番目の値を追加しようとすると問題が発生します。それは最後の値だけを置きます。何かご意見は? –