[英]Passing value of rating bar to next activity/intent
問題:我無法將評級值/數據從評級欄傳遞到另一個意圖。 它僅向我顯示此內容,而不是評分欄中的值/數據。
評分: MainActivity @ 79b604
我認為錯誤是它沒有從等級欄正確獲取值或未正確傳遞值。 這是我的代碼:
MainActivity.java
public class MainActivity extends AppCompatActivity {
String rating_float = "0.0";
private TextView txtRatingValue;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RatingBar ratingBar = (RatingBar) findViewById(R.id.ratingBar);
ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {
@Override
public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
rating_float = String.valueOf(rating);
}
});
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Context context = getApplicationContext();
CharSequence text = "";
Intent intent_rating = new Intent(this, SecondActivity.class);
intent_rating.putExtra("rating_float", toString());
startActivity(intent_rating);
return super.onOptionsItemSelected(item);
}}
SecondActivity.java
public class SecondActivity extends AppCompatActivity {
private TextView Msg;
String PassedValue = null;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
PassedValue = getIntent().getStringExtra("rating_float");
Msg = (TextView) findViewById(R.id.Msg);
Msg.setText("Dimension: 479\nFormat: JPEG\nSize: 360x360\nRating: " + PassedValue);
}
問題:
那是因為您將MainActivity.toString()的結果傳遞給第二個活動
代替
intent_rating.putExtra("rating_float", toString());
你應該寫
intent_rating.putExtra("rating_float", this.rating_float);
您收到的很好,但沒有發送您必須發送的信息。
只需使用此:
intent_rating.putExtra("rating_float", rating_float);
首先,您需要將值保存到用於其他活動的意圖的putExtra
中
intent_rating.putExtra("rating_float", rating_float);
要在SecondActivity中獲取值,只需在需要該值的地方執行此操作。
Intent iin= getIntent();
Bundle b = iin.getExtras();
if(b!=null)
{
String rating_value =(String) b.get("rating_float");
}
簡單明了的解決方案
// 1stActivity
ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
float rating = rate.getRating();
Intent intent = new Intent(ContactActivity.this,RatingIntentSOF.class);
Bundle bundle = new Bundle();
bundle.putFloat("totalRating",rating);
intent.putExtras(bundle);
startActivity(intent);
//第二活動,獲取第一活動的數據。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_rating_intent_sof);
TextView textView = (TextView) findViewById(R.id.text);
Intent intent = getIntent();
Bundle bundle = intent.getExtras();
float totalRating = bundle.getFloat("totalRating");
textView.setText(String.valueOf(totalRating));
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.