本例驗證的是finishiAffinity()方法,正如demo中介紹的那樣No matter how deep you go,Activity.finishAffinity() will get you back,無論你走多遠,它都能把你帶
回來。
finishiAffinity()方法,可以關閉目前activity所屬的activity棧中所有的activity。如果所有activity都儲存在預設棧中,則使用該方法會直接退出程式。
本例是通過不斷調用自身,向棧中添加任意的activity,爾後通過調用finishiAffinity()方法結束掉所有的activity。
布局檔案activity_finish_affinity.xml,這裡沒有什麼難了解的,也就設定了一個文字的外觀樣式。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="5dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="No matter how deep you go,Activity.finishAffinity() will get you back"/>
<TextView
android:id="@+id/tv_finish_nest"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="5dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Current nesting:1"/>
<Button
android:id="@+id/bt_finish_nest"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:text="nest some more" />
<Button
android:id="@+id/bt_finish_finish"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Finish!" />
</LinearLayout>
建立FinishAffinityActivity類
public class FinishAffinityActivity extends Activity {
private TextView tv_nest;
private Button bt_nest,bt_finish;
private int nesting;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_finish_affinity);
tv_nest=(TextView) findViewById(R.id.tv_finish_nest);
bt_nest=(Button) findViewById(R.id.bt_finish_nest);
bt_finish=(Button) findViewById(R.id.bt_finish_finish);
nesting=getIntent().getIntExtra("current_nesting", );
tv_nest.setText("Current nesting:"+nesting);
bt_nest.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// 通過不斷調用自身向棧中添加activity
Intent intent = new Intent(FinishAffinityActivity.this, FinishAffinityActivity.class);
intent.putExtra("current_nesting", nesting+);
startActivity(intent);
}
});
bt_finish.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
finishAffinity();
}
});
}
}
别忘記在配置檔案中配置activity噢!