Android探究2：Android 5.0下 Dialog&AlertDialog 並不會影響Activity的生命週期

標籤：oncreate   scrolling   make   onpause   float   create   ted   you   message   

先給出結論：Dialog和AlertDialog並不會影響到Activity的生命週期，但會影響到Activity的優先順序。

核心代碼：

onCreated中：        Resources resources = this.getResources();        DisplayMetrics displayMetrics = resources.getDisplayMetrics();        final int widthPixels = displayMetrics.widthPixels / 2;        final int heightPixels = displayMetrics.heightPixels / 2;        //1        //Android 5.0下 Dialog&AlertDialog 並不會影響Activity的生命週期        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);        fab.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {//                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)//                        .setAction("Action", null).show();                //test Dialog//                EditText editText = new EditText(ScrollingActivity.this);//                editText.setLayoutParams(new ViewGroup.LayoutParams(widthPixels, heightPixels));//                Dialog dialog = new Dialog(ScrollingActivity.this);//                dialog.setContentView(editText);//                dialog.setTitle("標題");//                dialog.setCanceledOnTouchOutside(false);//                dialog.show();                //test Dialog                AlertDialog.Builder builder = new AlertDialog.Builder(ScrollingActivity.this);                builder.setTitle("彈窗")                        .setMessage("Msg")                        .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {                            @Override                            public void onClick(DialogInterface dialog, int which) {                                dialog.dismiss();                            }                        }).setPositiveButton("Yes", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        dialog.dismiss();                        ;                    }                }).setCancelable(false);                builder.create().show();            }        });In Activity: @Override    protected void onStart() {        super.onStart();        System.out.println("ScrollingActivity.onStart");    }    @Override    protected void onResume() {        super.onResume();        System.out.println("ScrollingActivity.onResume");    }    @Override    protected void onPause() {        super.onPause();        System.out.println("ScrollingActivity.onPause");    }    @Override    protected void onStop() {        super.onStop();        System.out.println("ScrollingActivity.onStop");    }

有興趣的同志可以建立個Activity體驗一下。

Android探究2：Android 5.0下 Dialog&AlertDialog 並不會影響Activity的生命週期