[英]Issues In Intent Passing Using Database
我的問題是如何使用另一個putExtra方法將評級欄值傳遞給另一個活動?任何一個解決這個問題? 這是我的第一項活動
public void giveRating(View v)
{
String Name = spinner.getSelectedItem().toString();
Float Rating = ratingBar.getRating();
String query = "insert into Rating values('"+Name+"',"+Rating+")";
try
{
sqLiteDatabase.execSQL(query);
AlertDialog.Builder ab = new AlertDialog.Builder(this);
ab.setMessage("DATA SAVED");
ab.show();
}catch (Exception e)
{
Log.e("InsertionException",""+e);
}
}
public void viewRating(View v)
{
try {
StringBuffer sb = new StringBuffer();
String query = "select * from Rating";
Cursor cursor = sqLiteDatabase.rawQuery(query, null);
boolean res = cursor.moveToFirst();
if (res) {
do {
String Name = cursor.getString(0);
String Rating = cursor.getString(1);
sb.append(Name + ":" + Rating+"\n");
} while (cursor.moveToNext());
} else {
AlertDialog.Builder ab = new AlertDialog.Builder(this);
ab.setMessage("No data To read");
ab.show();
}
String value = sb.toString();
Intent i = new Intent(MainActivity.this, Items.class);
i.putExtra("k1", value);
startActivity(i);
}
catch (Exception e)
{
Log.e("ReadDataEXception",""+e);
}
第二項活動
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.items_layout);
textView = (TextView)findViewById(R.id.tv3);
textView1 = (TextView)findViewById(R.id.tv4);
Intent i = getIntent();
String name;
Bundle b = getIntent().getExtras();
name= b.getString("k1");
textView.setText(name);
textView.setTextSize(20);
數據庫活動
public Database(Context c)
{
super(c,DBNAME,null,VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
try {
String query = "create table Rating(Name TEXT,Rating REAL)";
db.execSQL(query);
}catch (Exception e)
{
Log.e("TableCreationException",""+e);
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
您可以簡單地添加另一個帶有keyName
putExtra
Intent i = new Intent(MainActivity.this, Items.class);
i.putExtra("name", name);
i.putExtra("rating",rating);
startActivity(i);
從Items活動中獲取
Intent i = getIntent();
String name;
String rating;
Bundle b = getIntent().getExtras();
name= b.getString("name");
rating= b.getString("rating");
textView.setText(name);
textView1.setText(rating);
textView.setTextSize(20);
希望它對你有所幫助。
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