このアクティビティでは、データを動的に保存しようとしていましたが、エミュレーターで戻るボタンを押すと、リスト項目が削除されます.....
これが私の主な活動です...
public class Dynamic extends Activity {
Button bt,bt2;
EditText et,et2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt = (Button) findViewById(R.id.nameok);
et = (EditText) findViewById(R.id.name);
final String input = et.getText().toString();
bt.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (et.getText().length() == 0) {
Context context = getApplicationContext();
CharSequence text = "Enter Your Name";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
} else {
if (et.getText().length() == 0) {
Context context = getApplicationContext();
CharSequence text = "Enter Your Number";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
} else {
et2.setVisibility(View.VISIBLE);
bt2.setVisibility(View.VISIBLE);
bt2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String input = et.getText().toString();
String input1 = et2.getText().toString();
Intent in = new Intent(Dynamic.this, GetList.class);
in.putExtra("input", input);
in.putExtra("input1", input1);
startActivity(in);
}
});
}
}
}
});
}
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
et2 = (EditText) findViewById(R.id.number);
bt2 = (Button) findViewById(R.id.numberok);
}
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
これは私がリストを与えている私のリストです:
public class GetList extends Activity {
public void onCreate(Bundle savedInstanceState) {
ListView lv;
Button bt3;
ArrayAdapter<String> a_adapter;
ArrayList<String> x_listItems;
ArrayList<String> y_listItems;
super.onCreate(savedInstanceState);
setContentView(R.layout.list);
lv = (ListView) findViewById(R.id.listView1);
bt3 = (Button) findViewById(R.id.nameok1);
bt3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent in3=new Intent(GetList.this,Dynamic.class);
startActivity(in3);
}
});
x_listItems = new ArrayList<String>();
y_listItems = new ArrayList<String>();
a_adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, x_listItems);
lv.setAdapter(a_adapter);
Intent in = getIntent();
String inp = in.getStringExtra("input");
String inp1 = in.getStringExtra("input1");
if (null != inp && inp.length() > 0) {
x_listItems.add(inp);
a_adapter.notifyDataSetChanged();
}
if (null != inp1 && inp1.length() > 0) {
y_listItems.add(inp1);
Log.v("num", ""+y_listItems);
}
}
}