方法一：通过SetContentView切换Layout来实现界面的切换，这种方法相当于重绘Activity.

 

protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btnInsert = (Button) this.findViewById(R.id.btnInsert);    //获取btn        btnInsert.setOnClickListener(new View.OnClickListener() {    //添加监听器            @Override            public void onClick(View v) {                setContentView(R.layout.activity_insert);        //跳转            }        });    }

 

方法二：在一个程序中使用Intent对象来指定一个Activity，并通过startActivity方法启动这个Activity.

 

protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btnInsert = (Button) this.findViewById(R.id.btnInsert);    //获取按钮        btnInsert.setOnClickListener(new View.OnClickListener() {    //添加监听器            @Override            public void onClick(View v) {                Intent intent = new Intent();                intent.setClass(MainActivity.this, InsertActivity.class);    //设置Intent属性                MainActivity.this.startActivity(intent);    //跳转            }        });    }

 

 

跳转实例：

protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btnInsert = (Button) this.findViewById(R.id.btnInsert);  //获取Button        Button btnDelete = (Button) this.findViewById(R.id.btnDelete);        Button btnSelect = (Button) this.findViewById(R.id.btnSelect);        Button btnMOdify = (Button) this.findViewById(R.id.btnModify);        ButtonListener buttonListener = new ButtonListener();   //绑定Button单击事件        btnInsert.setOnClickListener(buttonListener);        btnDelete.setOnClickListener(buttonListener);        btnMOdify.setOnClickListener(buttonListener);        btnSelect.setOnClickListener(buttonListener);    }    //设置Button跳转    class ButtonListener implements View.OnClickListener{        @Override        public void onClick(View v) {            int id = v.getId();            Intent intent = new Intent();            switch (id){                case R.id.btnInsert:                    intent.setClass(MainActivity.this, InsertActivity.class);                    MainActivity.this.startActivity(intent);                    break;                case R.id.btnDelete:                    intent.setClass(MainActivity.this, DeleteActivity.class);                    MainActivity.this.startActivity(intent);                    break;                case R.id.btnModify:                    intent.setClass(MainActivity.this, ModifyActivity.class);                    MainActivity.this.startActivity(intent);                    break;                case R.id.btnSelect:                    intent.setClass(MainActivity.this, SelectActivity.class);                    MainActivity.this.startActivity(intent);                    break;            }        }    }