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我需要按順序進行一些驗證，其中一些涉及複雜的數據庫操作。Android - 如何進行序列驗證
所以，我需要在一個單獨的線程UI線程中做到這一點，好嗎？ 但是有些驗證會向用戶顯示消息，需要確認什麼，當用戶確認時，應該調用下一個驗證。
此代碼示例解釋我想實現的東西：
void makeValidation1(){
if(condition1Valid()){
makeValidation2();
}else{
DialogInterface.OnClickListener onClick = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
makeValidation2();
}
};
AlertDialog.Builder builder = new AlertDialog.Builder(this)
.setMessage("really want to do this?")
.setPositiveButton("Yes", onClick);
builder.create().show();
}
}
void makeValidation2(){
if(condition2Valid()){
}else{
//...
}
}
boolean condition1Valid() {
// complex database Operations
return false;
}
boolean condition2Valid() {
//complex database Operations
return false;
}
//...
void makeValidation9(){
//...
}
我的問題是：什麼是最好的方法/模式來實現這一點？
1 - 爲每個驗證創建一個asyncTask？ （我不能創建只有一個AsyncTask，因爲確認消息可以停止流量）。
2 - 爲每個驗證創建一個Runnable，並在需要調用下一個驗證時創建要運行的線程？
3 - ???
編輯 我測試此代碼@BinaryBazooka，但是，這不是工作。任何幫助？
公共類MainActivity擴展活動實現OnClickListener {
Thread mThread;
ProgressDialog mProgressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Button button = new Button(this);
button.setText("Start");
setContentView(button, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
button.setOnClickListener(this);
}
@Override
public void onClick(View v) {
mThread = new Thread(new Runnable() {
@Override
public void run() {
validations();
}
});
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Start Thread?");
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
mProgressDialog = new ProgressDialog(MainActivity.this);
mProgressDialog.show();
mThread.run();
}
});
builder.create().show();
}
void validations(){
//this method go on separated thread
validation1();
validation2();
validation3();
}
void validation1(){
if(true){
final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setMessage("Validation 1 failed. Go validation 2?");
builder.setPositiveButton("Go", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
mProgressDialog.show();
//if user confirm, continue validation thread
mThread.notify();
}
});
builder.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
//if user cancel, stop validation thread
mThread.interrupt();
}
});
runOnUiThread(new Runnable() {
@Override
public void run() {
mProgressDialog.hide();
builder.create().show();
}
});
try {
synchronized (mThread) {
//wait for user confirmation
mThread.wait();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private void validation2() {
if(true){
final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setMessage("validacao 2 failed. Go validation 3?");
builder.setPositiveButton("Go", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
mProgressDialog.show();
mThread.notify();
}
});
builder.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
mThread.interrupt();
}
});
runOnUiThread(new Runnable() {
@Override
public void run() {
mProgressDialog.hide();
builder.create().show();
}
});
try {
synchronized (mThread) {
mThread.wait();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private void validation3() {
Log.i("TAG", "<<<<<<<<<< >>>>>>>>>>>>");
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "finished", Toast.LENGTH_SHORT);
}
});
}
}
泰。你的想法很有幫助 – Rodrigo