这个应用程序应该显示图像,学生可以在其中计算总金额,然后在editText文本框中输入值,然后将其与存储值进行比较.不幸的是,当我尝试将活动切换到某个点(有11个活动活动,其中三个显示图像很好)时,图像开始模糊,硬币难以彼此区分.我不知道这是
Java还是XML错误,但我已粘贴下面的代码.以下是XML代码.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".Ldsm" >
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:orientation="vertical" >
<Button
android:id="@+id/submitButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/submit" />
</LinearLayout>
<TextView
android:id="@+id/userQuestion"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/linearLayout"
android:layout_alignLeft="@+id/userAnswer"
android:layout_marginBottom="30dp"
android:text="@string/how_many_coins_total"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="@+id/userAnswer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/linearLayout"
android:layout_alignParentLeft="true"
android:layout_marginLeft="16dp"
android:ems="10"
android:inputType="number" >
<requestFocus />
</EditText>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/userQuestion"
android:layout_alignParentTop="true"
android:layout_marginLeft="50dp"
android:layout_marginTop="118dp" >
</LinearLayout>
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/userQuestion"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignRight="@+id/linearLayout"
android:src="@drawable/ic_coin4" />
这只是显示图像时看起来模糊的7个屏幕中的一个.以下是同一活动的Java代码.
package com.example.ldsm3;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import com.example.ldsm3.Problem5;
public class Problem4 extends Activity
{
private final int COIN3_SCREEN_ANSWER = 95;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_problem4);
Button submitButton = (Button)findViewById(R.id.submitButton);
submitButton.setOnClickListener(submitButtonListener);
}
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main,menu);
return true;
}
private OnClickListener submitButtonListener = new OnClickListener()
{
public void onClick(View arg0)
{
EditText editText = (EditText)findViewById(R.id.userAnswer);
int userAnswerValue = Integer.parseInt(editText.getText().toString());
// Build the Alert Dialog
android.app.AlertDialog.Builder alert = new AlertDialog.Builder(Problem4.this);
alert.setTitle("Answer");
alert.setCancelable(false);
if(userAnswerValue == COIN3_SCREEN_ANSWER)
{
alert.setMessage("Congratulations!!!");
}
else
{
alert.setMessage("Sorry,that's not right.");
}
alert.setPositiveButton("OK",new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog,int id)
{
Intent nextCoinScreenIntent = new Intent(Problem4.this,Problem5.class);
startActivity(nextCoinScreenIntent);
}
});
alert.show();
}
};
}
这是在Nexus 10上运行时的屏幕截图：
如果需要更多信息,请告诉我.
