Android原件：巢狀類別Dialog 和 Button的互動
實作影片：
前言
請先下載我的github來參考。會比較清楚，一言之就是一個螢幕和Button之間的互動。
要怎麼作應用還是要靠您自己了。
實作
在使用彈跳對話視窗時，必須 IMPLEMENTS 這個內部方法implements DialogInterface.OnClickListener
public class MainActivity extends
AppCompatActivity implements DialogInterface.OnClickListener
{
//螢幕
private TextView m_tv_message;
private int mChoice;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
//螢幕
private void init() {
m_tv_message = (TextView)
findViewById(R.id.message);
}
//Button1
public void clickAlertDialog(View view) {
new AlertDialog.Builder(this)
.setMessage("你好帥喔")
.setPositiveButton("I
Know!", this)
.setNegativeButton("hewe", this)
.show();
}
//Button1 implments DialogInterface.OnClickListener 必須要override的方法
@Override
public void onClick(DialogInterface dialog, int which) {
m_tv_message.setText("我知道");
}
//Button2 clickAlertDialogYesNo
//因為MainActivity介面的DialogInterface.OnClickListener在Button1已經使用過了
//所以在Button2我們在下面自己寫了一個方法
//並寫入clcikAlertDialogYesNo
public void clickAlertDialogYesNo(View view) {
//呼叫方法
AlertDialogYesNoListener
listener = new AlertDialogYesNoListener();
new AlertDialog.Builder(this)
.setMessage("你好帥喔")
.setPositiveButton("謝謝",
listener)
.setNegativeButton("sfdsfa", listener)
.show();
}
//Button2
private class AlertDialogYesNoListener
implements DialogInterface.OnClickListener {
@Override
public void onClick(DialogInterface
dialog, int which) {
switch (which) {
case
DialogInterface.BUTTON_POSITIVE:
m_tv_message.setText("Thnks");
break;
case
DialogInterface.BUTTON_NEGATIVE:
m_tv_message.setText("狗腿");
break;
}
}
}
//Button3使用內部類別，直接把DialogInterface.OnClickListener這方法寫在內部
//new DialogInterface.OnClickListener就是我們在Button2的時候寫在外面的方法
public void Button3(View view) {
new AlertDialog.Builder(this)
.setMessage("選擇一二三")
.setPositiveButton("hloOne", new
DialogInterface.OnClickListener() {
@Override
public void
onClick(DialogInterface dialog, int which) {
m_tv_message.setText("one");
}
}
)
.setNegativeButton("22222", new
DialogInterface.OnClickListener() {
@Override
public void
onClick(DialogInterface dialog, int which) {
m_tv_message.setText("two");
}
})
.setNeutralButton("threee", new
DialogInterface.OnClickListener() {
@Override
public void
onClick(DialogInterface dialog, int which) {
m_tv_message.setText("three");
}
})
.show();
}
//按下button4
public void Button4(View view) {
//建造陣列=把strings.xml內的response的string-array內的東西丟入
final String[] response =
getResources().getStringArray(R.array.response);
new AlertDialog.Builder(this,
android.R.style.Theme_Holo_Light_Dialog_NoActionBar)
//這邊必須用setTitle，不能像上面三個Button一樣使用setMessage
.setTitle("你好帥喔")
//setItems的用法
.setItems(response, new
DialogInterface.OnClickListener() {
@Override
public void
onClick(DialogInterface dialog, int which) {
m_tv_message.setText(response[which]);
}
})
.show();
//Button5
public void Button5(View view){
final String[] response=getResources().getStringArray(R.array.response);
final boolean[] selected=new boolean[response.length];//記錄每個選項的勾選狀態
new AlertDialog.Builder(this)
.setTitle("你好")
//MultiChoice是多選的用法
.setMultiChoiceItems(response,selected,new
DialogInterface.OnMultiChoiceClickListener(){
@Override
public void
onClick(DialogInterface dialog, int which, boolean isChecked) {
selected[which]=isChecked;
}
})
.setPositiveButton("OK",new DialogInterface.OnClickListener(){
@Override
public void
onClick(DialogInterface dialog, int which) {
StringBuilder
result=new StringBuilder();
for(int
i=0;i<selected.length;i++){
if(selected[i]){
result.append(response[i]).append("\n");
}
}
m_tv_message.setText(result);
}
})
.setNegativeButton("CANCEL",new
DialogInterface.OnClickListener(){
@Override
public void
onClick(DialogInterface dialog, int which) {
m_tv_message.setText("無言");
}
})
.show();
}
//Button6
public void Button6(View view){
final String[] response=getResources().getStringArray(R.array.response);
new AlertDialog.Builder(this)
.setTitle("你好帥")
//和Multi不同，這只能單選
.setSingleChoiceItems(response,0,new
DialogInterface.OnClickListener(){
@Override
public void
onClick(DialogInterface dialog, int which) {
mChoice=which;
}
})
.setPositiveButton("OK",new DialogInterface.OnClickListener(){
@Override
public void
onClick(DialogInterface dialog, int which) {
m_tv_message.setText(response[mChoice]);
}
})
.setNegativeButton("Cancel",new DialogInterface.OnClickListener(){
@Override
public void
onClick(DialogInterface dialog, int which) {
m_tv_message.setText("hellono
world" );
}
})
.show();
}
}
在values>strings.xml下加入字串，這是Button3-6會使用到的字串。
<string-array
name="response">
<item>我知道</item>
<item>少狗腿</item>
<item>大家都那麼說</item>
</string-array>
<item>我知道</item>
<item>少狗腿</item>
<item>大家都那麼說</item>
</string-array>
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