android拨号器

protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button button1 = (Button) this.findViewById(R.id.button1);button1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// TODO 自动生成的方法存根EditText editText1 = (EditText) MainActivity.this.findViewById(R.id.editText1);String number = editText1.getText().toString().trim();if (TextUtils.isEmpty(number)){Toast.makeText(MainActivity.this, "error", Toast.LENGTH_LONG).show();;return;}Intent intent = new Intent();intent.setAction(Intent.ACTION_CALL);intent.setData(Uri.parse("tle"+number));startActivity(intent);}});}

TextUtils.isEmpty(number)判断是否为空

String number = editText1.getText().toString().trim();//trim 函数屏蔽空格 回