android安装包安装后打开闪退

apk安装之后闪退，求解，源码如下：
MainActivity.java文件：
package com.example.c;
import android.app.Activity;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class MainActivity extends Activity {
private ImageView[] img=new ImageView[4];
private int[] imagePath=new int[]{
R.drawable.img01,R.drawable.img02,R.drawable.img03,R.drawable.img04
};
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
LinearLayout layout=(LinearLayout)findViewById(R.id.layout);
for(int i=0;i<imagePath.length;i++){
img[i]=new ImageView(this);
img[i].setImageResource(imagePath[i]);
img[i].setPadding(5, 5, 5, 5);
LayoutParams params=new LayoutParams(253,148);
img[i].setLayoutParams(params);
layout.addView(img[i]);
}
}
}