android – Imageview变得模糊

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://scheR_871_11845@as.android.com/apk/res/android"
xmlns:tools="http://scheR_871_11845@as.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_@R_7_10586@l"
    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.