请教大神们，我哪里写错了
ModPE.setItem(460,"record_chirp",0,"M4A1");
ModPE.setItem(461,"record_far",0,"2");
ModPE.setItem(462,"record_mall",0,"3");
ModPE.setItem(463,"record_mellohi",0,"4");
ModPE.setItem(464,"record_stal",0,"5");
ModPE.setItem(465,"record_strad",0,"6");
ModPE.setItem(466,"record_wait",0,"7");
ModPE.setItem(467,"record_ward",0,"8");
var ctx = com.mojang.minecraftpe.MainActivity.currentMainActivity.get();
ctx.runOnUiThread(new java.lang.Runnable({
run: function() {try{
simpleGU = new android.widget.PopupWindow();
var layout = new android.widget.RelativeLayout(ctx);
var button = new android.widget.Button(ctx);
button.setText("Fire");
button.setOnTouchListener(new android.view.View.OnTouchListener(
{
onTouch :function(v, e)
{
switch (e.getAction())
{var a=(getYaw()%360)*Math.PI/180
var b=getPitch()*Math.PI/180
var xv,yv,zv
xv=-Math.sin(a)*Math.cos(b)
yv=-Math.sin(b)
zv=Math.cos(a)*Math.cos(b)
var sn=Level.spawnMob(getPlayerX()+xv*2.1,getPlayerY()+yv*2.1,getPlayerZ()+zv*2.1,80)
setVelX(sn,xv*3)
setVelY(sn,yv*3)
setVelZ(sn,zv*3)
}
}
}));
layout.addView(button);
simpleGU.setContentView(layout);
simpleGU.setWidth(ctx.getWindowManager().getDefaultDisplay().getHeight()*0.2);
simpleGU.setHeight(ctx.getWindowManager().getDefaultDisplay().getHeight()*0.2);
simpleGU.showAtLocation(ctx.getWindow().getDecorView(), android.view.Gravity.RIGHT | android.view.Gravity.TOP, 0, ctx.getWindowManager().getDefaultDisplay().getHeight()*0.3);}
catch(err){print("Error: "+err);
}}}));
}

只有swith，没有case