package com.example.administrator.pactice_intent;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    private Button next;
    @Override
    protected void onCreate(Bundle savedInstanceState) {

        next = (Button) findViewById(R.id.next);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        next.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View view)
            {
            }
        });
    }
}

next是我的Button键
我一加上
next.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View view)
            {
            }
        });
下载到手机里的程序就闪退
手机用的是Mate8