Question

radiobutton 怎么获取选中状态

Answer 1

　　用savedInstanceState，代码如下：

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Button button = (Button) findViewById(R.id.button);
RadioButton radiobutton1 = (RadioButton) findViewById(R.id.radiobutton1);
RadioButton radiobutton2 = (RadioButton) findViewById(R.id.radiobutton2);

if (savedInstanceState != null) {

boolean tmp1 = savedInstanceState.getBoolean("radio1");
if (tmp1) {
radiobutton1.setChecked(true);
}
boolean tmp2 = savedInstanceState.getBoolean("radio2");
if (tmp2) {
radiobutton2.setChecked(true);
}
}

if (IsRadioButton1Selected) {
radiobutton1.setChecked(true);
}
if (IsRadioButton2Selected) {
radiobutton2.setChecked(true);
}

button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent it = new Intent(MainActivity.this, SecondActivity.class);
startActivity(it);
}
});

}

@Override
protected void onSaveInstanceState(Bundle outState) {

RadioButton radiobutton1 = (RadioButton) findViewById(R.id.radiobutton1);
RadioButton radiobutton2 = (RadioButton) findViewById(R.id.radiobutton2);

if (radiobutton1.isChecked()) {
IsRadioButton1Selected = true;
}
else if (radiobutton2.isChecked()) {
IsRadioButton2Selected = true;
}
else
Toast.makeText(this, "nothing selected", Toast.LENGTH_SHORT).show();

outState.putBoolean("radio1", IsRadioButton1Selected);
outState.putBoolean("radio2", IsRadioButton2Selected);
super.onSaveInstanceState(outState);
}
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